True. In a sequencing reaction, deoxyribonucleotides terminate a replicating segment of DNA, while dideoxyribonucleotides allow it to continue.
What is DNA sequencing?DNA sequencing is the process of determining the precise order of nucleotides in a DNA molecule. The technique is critical for geneticists because it can be used to discover genetic mutations, track the movement of a virus through a population, and trace the evolution of a species over time.
The process of DNA sequencing begins with the isolation of DNA from cells, which is then broken down into smaller fragments using enzymes.
Next, a sequencing primer is added, which allows researchers to identify the start of the DNA sequence they want to read. Then, four different nucleotides are added to the mixture, each labeled with a different fluorescent dye. These nucleotides are similar to those that occur naturally in DNA, except that they lack the oxygen atom at the 3’ position of the ribose sugar.
This is important because it prevents further nucleotides from being added to the chain, which allows researchers to read the sequence at that point.Next, DNA polymerase is added to the mixture, which begins to extend the DNA chain using the nucleotides in the mixture.
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during the light-dependent reactions, electron transport leads to the thylakoid space becoming
a. The site of NADPH production
b. The site where the calvin cycle occurs
c. More acidic than the stroma
d. The site of ATP synthesis
During the light-dependent reactions, electron transport leads to the thylakoid space becoming More acidic than the stroma . option (c)
What happens in the process of light-dependent reactions?Chlorophyll takes energy from sunshine and transforms it into chemical energy via the light-dependent reactions that occur at the thylakoid membrane. As water is broken down, light-dependent processes produce oxygen as a residue.
These processes take place within specialized membrane discs called thylakoids within the chloroplast and entail three steps: Photosystems are excited by light energy. An electron transport pathway is used to produce ATP. Photolysis of water and reduction of NADP+.
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which part of a flowering plant serves as the main site of photosynthesis?
Leaf is the main part of the flowering plant which serves as the main site of photosynthesis.
Leaf is a thin flattened structure that grows from the stem of the flowering plants. The leaf is rich in chloroplast which perform the function pf photosynthesis. Leaves are said to be the main principal appendage of the flowering plants.
Photosynthesis is the process of synthesizing food which is performed by the green plants, some bacteria and fungi. The process requires the raw materials like sunlight, water and carbon dioxide and they are used to synthesize food in the form of sugars and oxygen is the released as by-product.
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microscopic abrasions on human teeth provides clues to general types of food intake. abrasive particles in food leave marks and wear down tooth enamel, that:
The presence of microscopic abrasions on human teeth provides clues to the general types of food intake. Abrasive particles in food leave marks and wear down tooth enamel, indicating the type of food consumed.
The small lines, scratches, and marks that form on tooth enamel over time are known as microscopic abrasions. These abrasions are a result of daily wear and tear on our teeth from regular use such as chewing, brushing, and grinding. When we eat, small abrasive particles from our food can wear down the tooth enamel, leaving marks that provide clues to the general types of food intake.Abrasive particles in food leave marks and wear down tooth enamelAbrasive particles in food can leave distinct marks on tooth enamel, which can be observed and studied by dentists and researchers.
Certain types of food leave different kinds of marks, depending on their consistency and composition. For example, foods high in fiber and calcium, like fruits, vegetables, and dairy products, can leave flat, even marks on tooth enamel. In contrast, acidic and sugary foods, such as soft drinks, candy, and processed foods, can create rougher, more jagged marks on tooth enamel. These differences in tooth abrasion patterns can be used to identify patterns in food intake and develop strategies to reduce the risk of tooth decay and erosion.
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Meiosis is an important process by which genetic information is transferred when creating new cells from existing cells. during meiosis, a single cell divides into __________ daughter cells.
Meiosis is an important process by which genetic information is transferred when creating new cells from existing cells. During meiosis, a single cell divides into four daughter cells.
Meiosis is a special form of cell division that occurs in sexually reproducing organisms. It is the process by which cells divide and distribute their genetic material to form reproductive cells. Meiosis is responsible for the creation of gametes, which are specialized cells that fuse during fertilization to form a zygote.
The function of Meiosis is to provide for the production of haploid cells (gametes) from diploid cells (somatic cells) that contain two sets of chromosomes. The diploid cells contain one set of chromosomes from each parent, while the haploid cells contain only one set of chromosomes. During meiosis, the cells undergo two divisions, resulting in the production of four daughter cells that contain half the number of chromosomes as the parent cell.
The four daughter cells produced by meiosis are genetically distinct, due to the process of recombination, which occurs during the first division of meiosis. Recombination is the exchange of genetic material between homologous chromosomes that occurs during prophase I of meiosis. This process results in the creation of new genetic combinations in the daughter cells.
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according to the cellular clock theory of aging, cells can divide a maximum of
According to the cellular clock theory of aging, cells can divide a maximum of around 50 to 70 times. It is before losing the ability to divide further.
The cellular clock theory of aging suggests that human cells can only divide a certain number of times before stopping division completely. This limit on the number of times cells can divide is attributed to the shortening of telomeres, which are protective caps at the end of chromosomes that shorten with each cell division. The telomere shortening is part of the cell's genetic program, which is responsible for a limited number of cell divisions in a person's lifetime. Once the telomeres are gone, cells can no longer divide, and they start to accumulate cellular damage and lose their function.
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What is supposed to happen with the information on the gene for dystrophin and what happens when a person has a mutation of the gene?
Supposed to happen with the information on the gene for dystrophin is a protein that plays an important role in muscle function and when a person has a mutation of the gene it can result in a variety of disorders that affect the muscles and connective tissues in the body.
These disorders are collectively known as muscular dystrophies, and they can vary widely in severity and onset. The information on the gene for dystrophin is supposed to help researchers and clinicians better understand these disorders and develop effective treatments and therapies for them. Dystrophin is a protein that plays an important role in muscle function and development, it is found primarily in skeletal and cardiac muscle tissue, and it helps to stabilize the muscle fibers and protect them from damage during muscle contractions.
Mutations in the gene for dystrophin can lead to a variety of disorders that affect the muscles and connective tissues in the body, including Duchenne muscular dystrophy, Becker muscular dystrophy, and X-linked dilated cardiomyopathy. These disorders are typically progressive and can lead to muscle weakness, respiratory difficulties, and other serious health complications. There is currently no cure for muscular dystrophy, but there are a number of treatments and therapies that can help to manage the symptoms and slow the progression of the disease. These may include medications, physical therapy, orthotics, and other supportive care. In addition, ongoing research is being conducted into new treatments and therapies that could help to improve outcomes for people with these conditions.
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the activity of dna polymerases that removes incorrectly incorporated nucleotides is called proofreading repair photoreactivation repair error prone repair gap repair mismatch repair
The activity of DNA polymerases that removes incorrectly incorporated nucleotides is called proofreading. The correct option is A.
Proofreading is the process by which DNA polymerases correct mistakes made during DNA synthesis. This can help to avoid errors in genetic information and prevent mutations from occurring. DNA polymerases can check newly synthesized DNA for errors by looking for mismatches between nucleotides.The mechanism of proofreading is made possible by the exonuclease function of DNA polymerases, which allows them to remove nucleotides that have been incorrectly added to the growing DNA chain. The enzyme then switches back to polymerase mode and continues synthesizing the DNA chain. As a result, proofreading can help to maintain the integrity of genetic information and prevent the accumulation of mutations.Learn more about DNA polymerases: https://brainly.com/question/1343187
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Under the ___________ , species are identified based on their unique habitat requirements.
phylogenetic species concept,
biological species concept,
evolutionary species concept,
ecological species concept,
general lineage concept.
Under the ecological species concept, species are identified based on their unique habitat requirements. Here option D is the correct answer.
This concept defines a species as a group of organisms that occupy a distinct ecological niche and are adapted to a specific set of environmental conditions. The ecological species concept emphasizes the role of natural selection in shaping the characteristics and behavior of organisms and their relationship with their environment.
It recognizes that species evolve as a result of adaptation to different ecological niches, which can lead to genetic and phenotypic divergence and ultimately to the formation of new species.
The ecological species concept has been widely used in ecology and conservation biology to identify and protect species based on their unique habitat requirements and to study the ecological processes that shape biodiversity. However, it has also been criticized for being too subjective and difficult to apply in practice, as it relies on a detailed understanding of the ecological niche of each species.
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Complete question:
Under the ___________ , species are identified based on their unique habitat requirements.
A - phylogenetic species concept,
B - biological species concept,
C - evolutionary species concept,
D - ecological species concept,
E - general lineage concept.
which scientists used a bacteriophage to provided definitive evidence that dna was the transforming factor?
The scientists who used a bacteriophage to provide definite evidence that DNA was the transforming factor were Alfred Hershey and Martha Chase.
Hershey and Chase experiment provided the proof that DNA was the genetic material. They used bacteriophages as the key material for their experiment. They used radioactive phosphate ( ³²P) for the detection of the genetic material.
Bacteriophages are the viruses that infect bacteria. They inject their genetic material into the host bacterium and use its machinery for their own multiplication and synthesis of new bacteriophages. The bacteriophages can make use of either lytic cycle or lysogenic cycle for their growth.
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eleanor jackson, age 81, has 23% bands in her white blood cell differential. is that normal, high, or low?
Eleanor Jackson, an 81-year-old woman, has 23% bands in her white blood cell differential. The answer is that it is high.
Blood cells are cells that are present in blood and are critical for transporting oxygen, combating infections, and preventing blood loss. Blood cells are of three kinds: red blood cells, white blood cells, and platelets.
A differential count is a laboratory test that measures the percentages of each type of white blood cell present in the blood. This test examines the various types of white blood cells, such as neutrophils, basophils, eosinophils, lymphocytes, and monocytes, to see whether there is an imbalance in their numbers.
When the test shows that the bands, which are a type of neutrophil, are at 23%, it is high, which indicates that there may be an infection present in the body.
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In one or two sentences, choose an ecosystem and describe a food chain within that ecosystem, giving examples of producers and consumers.
Answer: In a tropical forest ecosystem, an example of a food chain is
Kale -> Frog -> Rabbit -> Coyote
Whereas Kale is the producer, frog is a primary consumer, rabbit is a secondary consumer and coyote is a tertiary consumer or an apex predator
The forest ecosystem is home to a complex food chain, with grass as producers and rabbits, deer, snake, and lion as consumers.
What is a food chain?A food chain is a linear sequence of organisms in an ecosystem, where each organism serves as a source of food or energy for the next organism in the sequence.
The chain typically starts with a producer, such as a plant, which is then consumed by a primary consumer, such as an herbivore, which is then consumed by a secondary consumer, such as a carnivore, and so on. Food chains help to illustrate the flow of energy and nutrients through an ecosystem.
In a forest ecosystem, the grass is a producer, which is eaten by a grasshopper, and the grasshopper is eaten by a snake, and then the snake is eaten by a lion. Grasshopper, snake, and lion are consumers.
Grass → grasshopper → snake → lion
When the food chain becomes complex and contains more than one food chain, then it is called a food web.
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information from the left visual field enters the left visual cortex via the . group of answer choices c. superior colliculus d. corpus callosum a. optic chiasm b. anterior commissure
Information from the left visual field enters the left visual cortex via the optic chiasm.
The correct answer is option a.
The optic chiasm is a structure located at the base of the brain, where the optic nerves cross over each other. This allows the left visual field information to be transmitted to the right side of the brain, and vice versa.
The superior colliculus and anterior commissure are also involved in visual processing, but they are not directly involved in transmitting information from the left visual field to the left visual cortex. The corpus callosum is a structure that connects the two hemispheres of the brain, but it is not directly involved in visual processing.
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a structure is formed by a dorsal and ventral fiber, and it exits through an intervertebral foramen. which structure of this kind supplies the lower extremities?
The structure you are referring to is the spinal nerve.
The spinal nerves are formed by the fusion of dorsal and ventral nerve roots as they exit the spinal cord through the intervertebral foramina between adjacent vertebrae
Each of the 31 pairs of spinal nerves has a name based on the level of the spinal cord it originates from. The lower extremities receive motor and sensory input from the spinal nerves, among other body areas.
The lumbar spinal nerves (L1-L5) and the sacral spinal nerves are specifically the spinal nerves that supply the lower extremities. (S1-S5). While the sacral spinal nerves originate from the sacral area of the spinal cord, the lumbar spinal nerves do not. The muscles, skin, and joints of the lower extremities are innervated by these nerves, enabling movement and sensation.
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alternative forms of a gene that influence the same trait and are found at the same location in homologous chromosomes are called
Alternative forms of a gene that influence the same trait and are found at the same location in homologous chromosomes are called alleles.
Alternative forms of a gene that influence the same trait and are found at the same location in homologous chromosomes are called alleles. Alleles are different versions of a gene that can produce different variations of a trait.
For example, the gene for eye color has several different alleles, such as brown, blue, green, and gray. The specific allele that an individual has for a particular gene will determine the expression of that trait. Alleles can be dominant, recessive, or co-dominant, and their inheritance patterns can be used to predict the likelihood of certain traits appearing in offspring.
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this or that? for each question, please choose the symptom, treatment or characteristic associated with peptic ulcer disease.physiological changeerosion or growth
For the given question, the symptom, treatment or characteristic associated with peptic ulcer disease are as follows:
Symptoms: Pain in the abdomen or back, bloating, heartburn, nausea or vomiting, weight loss, poor appetite, feeling full or bloated after a small meal
Treatment:
Antibiotics to kill H. pylori bacteriaProton pump inhibitors (PPIs)H2 blockersAntacidsCytoprotective agentsCharacteristic: Peptic ulcers may be erosive or growth. Peptic ulcer is an open sore that is formed on the inner lining of the stomach, esophagus, or small intestine. It can result in severe stomach pain and cause gastrointestinal problems.
Peptic ulcers can be caused by various factors such as drinking too much alcohol, smoking, taking too many pain relievers or aspirin, chronic inflammation in the digestive tract, and infection with H. pylori bacteria.
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compare the effect of the stratospheric ozone and tropospheric ozone on people’s health
Answer:
The stratospheric ozone, which is responsible for absorbing UV radiation, does not pose a health risk to people, whereas the tropospheric layer is in charge of causing pollutants to become trapped inside human lungs.
Describe the controversy surrounding animal research by describing both points of view. State your opinion and justify it with valid data. Some research is necessary in order to support your point, provide sources where the information was gathered from.
The morality of employing animals in scientific experiments is at the centre of the debate over animal experimentation.
What is the debate regarding using animals in research?Using animals in research can hinder and delay discovery. The failure of drugs and medical procedures in animal research may prevent them from ever being developed for human use. As medications that fail in animal testing are rarely tested on people, it is impossible to determine how frequently this happens.
What is the rationale behind using animals in research?The use of animals is essential for biomedical research for a number of reasons, including the following: Animals and humans share a lot of biological similarities. In fact, mice and humans share more than 98% of our DNA.
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what would the data look like if this model was actually happening? you may include a sketch of what the tube would look like (sketch on paper and insert a picture in the space below) to aid in your explanation.
The data would look like a tube-like structure with electrons travelling along it, as seen in the attached sketch. The tube would have a positive voltage applied to it, and a vacuum environment inside, allowing the electrons to move freely at high speeds.
The electrons would be attracted to the positive voltage, and would travel along the tube in a uniform stream, bouncing off the walls of the tube as they travel. The data that the model is representing would be the speed of the electrons, their direction, and their position inside the tube.
This data could be used to analyze the flow of electricity in a circuit, or to measure the amount of current in an electrical system.
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how many lattice points are in a body-centered tetragonal unit cell?
5. The data represented in the scatterplot compare the ages and heights of adult humans.
a. Analyze the data and summarize what the scatterplot shows about the relationship between height and age in adult humans. Then explain what the line of best fit visually represents about the variables.
b. What does the correlation coefficient, r, indicate about the strength of the relationship between the variables? Explain your answer.
c. Based on these data, could you use an adult human's age to predict that person's height? Explain why or why not.
The scatterplot shows that there is a weak positive correlation between height and age in adult humans, meaning that as age increases, there is a slight tendency for height to also increase.
What is the line of best fit?The line of best fit visually represents the average trend in the data, but it is not a strong predictor of individual heights based on age alone.
b. The correlation coefficient, r = 0.068, indicates a very weak positive correlation between height and age in adult humans. This suggests that age is not a strong predictor of height and that other factors may be more important in determining an individual's height.
c. Based on these data, it would not be very accurate to use an adult human's age to predict their height. While there is a slight positive correlation between height and age, the weak correlation coefficient and the wide scatter of the data points suggest that age is not a strong predictor of height. Other factors such as genetics, nutrition, and environmental factors may play a more significant role in determining an individual's height.
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a 1-ml aliquot of a urine sample was placed into a tube which contains 5-ml of growth media. after making this dilution, 0.25 ml was plated onto a nutrient agar plate and incubated overnight at 37 degrees. the following day the plate was evaluated for colony growth and 97 discrete colonies were counted. what was the cfu/ml of bacteria in the original sample?
The cfu/ml of bacteria in the original sample is 2328. There are different methods that can be used to determine the cfu/ml of bacteria in a sample.
There are different methods that can be used to determine the cfu/ml of bacteria in a sample.
However, one of the methods involves the use of the formula: CFU/ml = (number of colonies counted / volume plated) x dilution factor. Given the following information: a 1-ml aliquot of a urine sample was placed into a tube which contains 5-ml of growth media.
After making this dilution, 0.25 ml was plated onto a nutrient agar plate and incubated overnight at 37 degrees. the following day the plate was evaluated for colony growth and 97 discrete colonies were counted. The volume plated is 0.25 ml.
The dilution factor can be calculated as follows: 1 ml sample was diluted in 5 ml growth media, therefore: dilution factor = (volume of sample/volume of sample + volume of diluent) = (1/1+5) = 1/6. Thus, the dilution factor is 1/6.Substituting the values into the formula: CFU/ml = (number of colonies counted / volume plated) x dilution factor= (97/0.25) x 1/6= 2328 CFU/ml.
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How are all planets in the solar system similar?
They have a gas atmosphere.
They have a water atmosphere.
They have a gas surface composition.
They have a rock surface composition.
Answer:
They have a rock surface composition.
What are the 3 stages of general adaptation syndrome?
The 3 stages of general adaptation syndrome are:
Alarm stageResistance stageExhaustion stageGeneral adaptation syndrome (GAS) is a response pattern, discovered by Hans Selye, which explains the body's reaction to long-term, continued stress. The three stages of General Adaptation Syndrome (GAS) are alarm, resistance, and exhaustion.
Alarm: This is the first stage of GAS and occurs when the body is initially exposed to stress, It is an automatic response that prepares the body to fight or flee.Resistance: This is the second stage of GAS and is characterized by the body's attempt to resist the stressor. During this stage, the body increases its capacity to cope with stress.Exhaustion: This is the third and final stage of GAS and occurs when the body's reserves are depleted and it is unable to cope with the stressor. This stage can lead to physical and psychological exhaustion.Learn more about general adaptation syndrome: https://brainly.com/question/1444902
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all bond types in a carboxylic acid have significant polarity, except ______.
All bond types in a carboxylic acid have significant polarity, except the bond between the two carbon atoms in the carboxyl group.
A carboxyl group is a functional group that consists of a carbonyl group (C=O) and a hydroxyl group (-OH) attached to the same carbon atom, which is also bonded to a third atom or group.
The carbonyl group in the carboxyl group has a significant polarity due to the electronegativity difference between the oxygen and carbon atoms. The oxygen atom is more electronegative than the carbon atom, which means that it attracts the shared electrons in the bond more strongly, creating a partial negative charge on the oxygen and a partial positive charge on the carbon.
The hydroxyl group in the carboxyl group also has a significant polarity, with the oxygen atom being more electronegative than the hydrogen atom, resulting in a partial negative charge on the oxygen and a partial positive charge on the hydrogen.
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the splitting of water and the generation of oxygen occur where?
The splitting of water and the generation of oxygen occur in the thylakoid membranes of the chloroplast during the light-dependent reactions of photosynthesis. This process is also known as photosystem II.
The oxygen that is produced is released into the atmosphere as a byproduct of the photosynthetic process. The process of photosynthesis converts carbon dioxide and water into oxygen and glucose. Photosynthesis is a process that takes place in the chloroplasts of plant cells, which are organelles that are responsible for carrying out the process of photosynthesis.
Chloroplasts contain thylakoid membranes, which contain the pigments that are responsible for absorbing light energy during the photosynthetic process. The thylakoid membranes are also where the electron transport chain takes place during the light-dependent reactions. This is where water molecules are split apart into oxygen and hydrogen ions.
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what are the alleles on each homologous chromosome of the parental wild-type trihybrid soybean plant? use l , r , and t to represent dominant alleles and l , r , and t for recessive alleles.
The alleles on each homologous chromosome of the parental wild-type trihybrid soybean plant are as follows:
Homologous ChromosomeAlleles on Homologous ChromosomeParent 1Parent 2LrTlrtLRtlr
Homologous chromosomes are a set of chromosomes that resemble each other in terms of size, form, and features, but differ in terms of hereditary details. Homologous chromosomes, also known as homologs or homologous pairs, are chromosomes in which one chromosome is inherited from the mother and the other is inherited from the father.
Homologous chromosomes are found in sexually reproducing species. They include the same genes in the same location, but the alleles (forms of the gene) of these genes might differ.
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seven limting factors that you might find in an environment near you.
Answer:
1. Temperature: Temperature i
2. Water: Water .
3. Nutrients: Nutrients
4. Light: Light
5. pH: The pH
6. Predation: Predation
7. Disease: Diseases
Explanation:
thanks.
if we created a null mutation that prevented polymerases from being loaded onto a replicating strand of dna, in which structure would we most likely find the mutation?
If we created a null mutation that prevented polymerases from being loaded onto a replicating strand of DNA, we would most likely find the mutation in the replication fork.
The replication fork is the area where the replication of DNA will actually take place. There are two strands of DNA that are exposed once the double helix is opened. One strand is referred to as the leading strand, and the other strand is referred to as the lagging strand.
A replication fork is the Y-shaped structure created when a double-stranded DNA molecule is unwound by DNA helicase and polymerase enzymes during DNA replication. During DNA replication, polymerases are responsible for adding nucleotides to the new strands of DNA as they are built. As a result, if a mutation prevented polymerases from being loaded onto a replicating strand of DNA, the replication fork would be affected.
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are tarsiers more closely related to lemurs and lorises or to monkeys and apes? describe three anatomical traits that can be used as evidence to support your answer.
Tarsiers are more closely related to lemurs and lorises than to monkeys and apes.
Evidence supporting this includes: (1) the presence of grooming claws on their second and third digits, which are also found in lemurs and lorises, but not in monkeys and apes; (2) the lack of a full bony enclosure around the eye socket, known as a postorbital bar, which is a feature of lemurs and lorises, but not of monkeys and apes; and (3) the ability to rotate their heads almost 180 degrees, which is a shared trait among tarsiers, lemurs, and lorises, but not among monkeys and apes.
These traits suggest that tarsiers share a more recent common ancestor with lemurs and lorises than with monkeys and apes.
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Question 8 of 10
Your friend claims that an energy pyramid may not have
the same shape as a pyramid of numbers for the same
ecosystem, as shown in the diagrams.
Energy Pyramid
3
level 2
1
Trophic
Joules (J)
Trophic
level
4
3
2
1
Pyramid of Numbers
Number of individuals
Which statement accurately uses the diagrams to support this claim?
Option A is correct. This trophic level for top consumers should be at the summit of an energy pyramid, but it is at the bottom in this diagram.
What form does the ecosystem's energy pyramid take?In an ecosystem, the energy pyramid is always erect. An ecosystem is the structure or community created by the interaction of biotic (living) components such as plants, animals, bacteria, and microorganisms and abiotic (non-living) components such as air, water, temperature, and many other physical variables.
What distinguishes the pyramid of numbers from the pyramid of energy?The pyramid of energy depicts the output and/or flow rate of energy at various trophic levels. The connection between producers and consumers at progressively lower trophic levels is depicted by the pyramid of numbers, in contrast.
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Question:
The diagram shows a pyramid of numbers for a certain ecosystem. Your friend claims that an energy pyramid for the same ecosystem may not have the same shape as the pyramid of numbers. Which statement accurately uses the diagram to support your friend's claim?
A. The trophic level of top consumers would be the largest in an energy pyramid, but that trophic level is the smallest in this diagram.
B. The fourth trophic level would be the largest in an energy pyramid, but that level is the smallest in this diagram.
C. The trophic level of producers would be the first level in an energy pyramid, but the producer level is the second level in this diagram.
D. The trophic level of producers would be the largest in an energy pyramid, but the producer level is the second smallest in this diagram.
Which one is A. B. C. or D.