"Organisms with more favourable features" are more likely to survive and procreate through a process called natural selection. As a form of evolution, natural selection works. Hence (b) is the correct option.
More environmental adaptation increases an organism's chance of surviving and dispersing the genes that contributed to its success. In the course of time, this process leads to species changing and diverging. Genetic diversity is needed, modification-based descent results, and varying levels of reproductive success are all factors. Variation, inheritance, selection, and time are the four guiding concepts of evolution. These are thought to be the elements of the natural selection-based evolutionary mechanism.
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which statement is true about natural selection? choose the correct answer.
a. responses it forms new traits.
b. it forms new traits. it acts on variable traits.
c. it acts on variable traits. it forms new genetic material.
d. it forms new genetic material.
e. it acts on genetic material directly.
what type of vaccine involves host synthesis of viral antigens? what type of vaccine involves host synthesis of viral antigens? conjugated vaccine subunit vaccine nucleic acid vaccine attenuated whole-agent vaccine toxoid vaccine'
A nucleic acid vaccine involves the host synthesis of viral antigens. A nucleic acid vaccine is a type of vaccine that uses genetic material such as DNA or RNA to stimulate an immune response.
It is distinct from traditional vaccines, which typically use weakened or dead forms of a pathogen to elicit an immune response. Because they don't rely on pathogens or toxins to stimulate immunity, nucleic acid vaccines have the potential to be safer and more effective than traditional vaccines. They are also relatively easy and inexpensive to manufacture.
The type of vaccine that involves host synthesis of viral antigens is the nucleic acid vaccine. This type of vaccine utilizes genetic material from the pathogen, either in the form of DNA or RNA, which is introduced into the host's cells. The host cells then use this genetic material to produce the viral antigens, which in turn stimulate an immune response. Nucleic acid vaccines are a promising approach as they can be rapidly developed and are often more stable than traditional vaccines.
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______________ evolved during the Carboniferous Period.
Ferns, horsetails and seed-bearing trees evolved during the Carboniferous Period.
What evolved during Carboniferous Period?Many important life forms evolved during Carboniferous Period, which lasted from about 359 million to 299 million years ago. One of the most notable developments during this time was the emergence and diversification of early amphibians, which were the first vertebrates to make the transition from water to land.
In addition, the Carboniferous Period saw the evolution of many types of plants, including ferns, horsetails, and seed-bearing trees. These plants formed vast forests that eventually gave rise to the coal deposits that are so important to the world's energy supply today.
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a blockage in the lymphatic system could have which of the following consequences? question 1 options: a. an increase in interstitial fluid volume b. an increase in blood volume returning to the right atrium c. a reduction in colloid osmotic pressure d. (a) and (b) are correct; (c) is incorrect e. (a), (b), and (c) are all correct
A blockage in the lymphatic system could result in an increase in interstitial fluid volume and an increase in blood volume returning to the right atrium, but it would not lead to a reduction in colloid osmotic pressure, the correct option is (d).
The lymphatic system plays a crucial role in maintaining fluid balance in the body by draining excess interstitial fluid and returning it to the bloodstream.
When there is a blockage in the lymphatic system, excess interstitial fluid accumulates, leading to swelling or edema in the affected area. This excess fluid can also increase the volume of blood returning to the right atrium, leading to an increase in central venous pressure, the correct option is (d).
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The complete question is:
A blockage in the lymphatic system could have which of the following consequences? options:
a. an increase in interstitial fluid volume
b. an increase in blood volume returning to the right atrium
c. a reduction in colloid osmotic pressure
d. (a) and (b) are correct; (c) is incorrect
e. (a), (b), and (c) are all correct
what are some genetic factors that affect growth and survival.
Answer:
height, weight, body structure, the colour of their eye, the texture of their hair, and even intelligence and aptitudes.
Explanation:
The evolution of the _______ in reptiles allowed animals to colonize land because it prevents the egg from _________.
A. jelly-coated egg; being eaten
B.amniotic egg; drying out
C.jelly-coated egg; drying out
D.amniotic egg; mutating
Answer:
The evolution of the amniotic egg in reptiles allowed animals to colonize land because it prevents the egg from drying out. The amniotic egg is a type of egg that has a shell and four membranes that protect the embryo from desiccation (drying out) and other environmental hazards. This adaptation allowed reptiles to lay their eggs on land, away from water sources, and to colonize terrestrial habitats that were previously inaccessible to them.
a patient has a mutant liver glycogen synthase kinase (gsk) that cannot be phosphorylated. answer the following questions (no more than 50 words per question) what would be the default state of this mutant gsk? how would this affect the amount and structure of glycogen particles in liver and in muscle cells? what clinical features will you expect to see if the mutation affects liver gsk only? what clinical features will you expect to see if the mutation affects muscle gsk only?
The default state of the mutant GSK would be in an active, unphosphorylated state. This would lead to increased glycogen synthesis and accumulation in the liver, but not in muscle cells. Clinical features would depend on whether the mutation affects liver or muscle GSK.
Since the mutant GSK cannot be phosphorylated, it would by default be in an active condition. This would boost the production of glycogen in both liver and muscle cells, leading to the development of bigger, branchier glycogen particles.
If the mutation only effects the liver GSK, the patient may experience hypoglycemia as a result of the liver's excessive production of glycogen. Due to the abnormal glycogen structure in muscle cells, if the mutation only effects muscle GSK, the patient may exhibit exercise intolerance or muscle weakness.
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what is the advantage of having a complete digestive tract (which started in mollusks) as opposed to the gastrovascular cavity found in cnidarians or the simple gut tube of some flatworms?
The complete digestive tract, which originated in mollusks, has numerous advantages over the gastrovascular cavity found in cnidarians and the simple gut tube of some flatworms.
This includes the ability to separate the mouth from the anus and the specialization of different segments for various digestive activities. The digestive tract is an organ system found in animals that is responsible for breaking down and absorbing nutrients from food. It's a series of organs connected from the mouth to the anus in the case of the complete digestive tract (mouth, pharynx, esophagus, stomach, small intestine, large intestine, and rectum), allowing for a one-way flow of food.
The gastrovascular cavity is a basic digestive system found in cnidarians, while the flatworms have a simple gut tube. Both of these systems have a single opening through which food enters and waste exits. Food digestion, nutrient absorption, and waste elimination all take place in the same cavity in this type of digestive system. A complete digestive tract has several advantages over these basic digestive systems. First and foremost, the separation of the mouth from the anus allows for a one-way flow of food, which is crucial for efficient nutrient absorption. In contrast to the gastrovascular cavity and the simple gut tube, the specialized segments of the digestive tract allow for specific digestive activities to take place. Enzymes and other digestive fluids are secreted in these segments to break down specific nutrients, allowing for more efficient absorption. Furthermore, because the complete digestive tract has multiple exits for waste removal, it allows for a faster and more efficient elimination of waste products.
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What is the name of the new island off Iceland that began succession in 1963?
Answer: Surtsey
Explanation:
a disease caused by gene x is an autosomal recessive disease, but it is modified by expression of a gene on another chromosome, gene y. if gene y has at least one dominant allele, then the disease is aggressive and becomes evident at age 2. if gene y has two recessive alleles, then the disease is mild and dormant until the age of 50. two people who are heterozygous for both gene x and y have a child. what are the chances the child will have the aggressive form of the disease?
If the defective gene that causes a disorder is found on the X chromosome, the ailment is said to be X-linked. Only when two copies of the gene for a recessive trait are present on autosomal chromosomes can that trait be manifested.
Genetic disorders connected to mutations in genes on the X chromosome are referred to as having X-linked recessive inheritance. Because he contains just one X chromosome, a male who carries this mutation will be affected. A female who carries a gene mutation in one X chromosome but has a normal gene on the other X chromosome usually has no symptoms. A recessive gene on the X chromosome causes illnesses like haemophilia and Duchenne muscular dystrophy.
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as an up-and-coming scientist, you decide to create mutant bacteriophages to better examine structural function. your first mutant lacks a sheath motor protein, so you decide to call this muts. to determine the loss of function, you add muts at a multiplicity of infection (moi) of 1 to escherichia coli cells and examine the rate of infection. you're very surprised to find that none of the escherichia coli cells are infected. what happened? choose one: a. muts damaged the bacteriophage tail fibers. b. you failed to add enough bacteriophages to infect the e. coli. c. muts created ghost bacteriophages. d. muts prevented the sheath protein from contracting.
The E. coli strain H7 is a person from a gathering that creates a strong poison that hurts the small digestive system's coating. This may result in silly bloating. At the point when you ingest this kind of microorganisms, you get E. coli contamination. The correct answer is Coil.
E. coli serotype O157: H7 is an uncommon creature that has been connected to youngsters' hemolytic uremic disorder (HUS) and hemorrhagic colitis in all age bunches as of late.
These E. coli strains are primarily carried by cattle, in particular. Due to poor slaughter processing, their feces may end up contaminating other foods (like milk and vegetables) and water. Additionally, their feces may contaminate their meat.
The gram-negative bacterium Escherichia coli (E. coli) is the cause of numerous diarrheal diseases like dysentery and traveler's diarrhea.
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which compound is classified as high energy? group of answer choices atp acetyl-coa phosphoenolpyruvate all of the answers are correct. phosphocreatine
All of the following given options are classified as high energy: ATP, Acetyl-CoA, Phosphoenolpyruvate, and Phosphocreatine.
ATP stands for Adenosine Triphosphate. It is the main energy component of the body which is synthesized in the mitochondria. The energy of ATP is in its phospho-anhydride bonds. The breakdown of these bonds releases the energy.
Phosphocreatine is the quickest mobilizing reserve of high energy. Inside the body it is required for the maintenance and recycling of ATP. Phosphocreatine donates its phosphate for the formation of ATP. The skeletal muscles are the main reserves of phosphocreatine. Brain and myocardium also contain phosphocreatine.
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why was it critical for you to use these four genes instead of just one? Please provide specific evidence from the data provided.
The reason why it was critical to use these four genes instead of just one is that each gene provides unique information about the organism's characteristics and evolutionary history.
Why is genetic makeup dependent on multiple genes?Using multiple genes instead of just one can provide a more accurate and reliable representation of an organism's genetic makeup.
For example, in the case of the study provided, the researchers used four genes to investigate the evolutionary relationships among different species of primates. The data showed that each of the four genes provided different information and helped to resolve different parts of the evolutionary tree. Gene 1 provided information about the relationship between New World monkeys and Old World monkeys, while Gene 2 provided information about the relationship between humans and apes.
Similarly, Gene 3 provided information about the relationship between gibbons and other primates, while Gene 4 provided information about the relationship between lemurs and other primates. By combining the information from all four genes, the researchers were able to construct a more accurate and detailed evolutionary tree than they would have been able to with just one gene.
In summary, using multiple genes instead of just one is critical because each gene provides unique information that can help to provide a more accurate and reliable representation of an organism's genetic makeup and evolutionary history.
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why is understanding the causes of different diseases important???
Answer:
It’s important to understand the causes of different diseases so that they can be prevented. If they can’t be avoided, then this information can help identify the proper route for treatment.
Explanation:
Answer:
Because by understanding the causes of these diseases, they can be prevented.
That is why it is so important to know the reasons why certain diseases appear.
a genetic cross performed many times produces 798 long stemmed plants and 266 short stemmed plants. the probability of obtaining a short stemmed plant in a similar cross is
The probability of obtaining a short-stemmed plant in a similar cross is 25%.
A genetic cross performed many times produces 798 long-stemmed plants and 266 short-stemmed plants. To find the probability of obtaining a short-stemmed plant in a similar cross, follow these steps:
1. Calculate the total number of plants produced in the cross:
Total plants = Long-stemmed plants + Short-stemmed plants
Total plants = 798 + 266 = 1064
2. Determine the probability of obtaining a short-stemmed plant:
Probability of short-stemmed plant = (Number of short-stemmed plants) / (Total number of plants)
Probability of short-stemmed plant = 266 / 1064
3. Simplify the fraction:
Probability of a short-stemmed plant ≈ 0.25
So, the probability of obtaining a short-stemmed plant in a similar genetic cross is approximately 0.25 or 25%.
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mutual symbioses between fungi and animals include multiple select question. corals that associate with saltwater fungi. leaf cutters ants that cultivate fungi. fungi in the guts of ruminant animals. arbuscular mycorrhizal fungi in association with aphids.
Mutual symbioses between fungi and animals include: Leaf-cutter ants that cultivate fungi and Fungi in the guts of ruminant animals. These are the two main examples of mutual symbioses between fungi and animals.
Leaf-cutter ants have a mutual symbiotic relationship with fungi they cultivate.
The ants collect leaves and bring them back to their nests, where the leaves are used to grow a specific type of fungus.
The ants feed on the fungus, and the fungus receives a constant food supply from the ants, resulting in a mutually beneficial relationship.
Ruminant animals have fungi in their guts that help break down complex plant material, making digestion easier for the animal.
In return, the fungi receive a stable environment and nutrients from the animal's digestive system, resulting in a mutualistic relationship.
However, the examples of corals associating with saltwater fungi and arbuscular mycorrhizal fungi in association with aphids are not typical examples of mutual symbiotic relationships between fungi and animals.
Therefore, the correct answers are Leaf-cutter ants that cultivate fungi and Fungi in the guts of ruminant animals.
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HELP PLS ASAP MARKING BRAINLEIST
The best description of fungi function of the structure from the image is the A, spore production.
Why do fungi produce spores?Fungi produce spores as part of their reproductive process. Spores are single-celled or multicellular structures that are capable of developing into a new individual fungus when they land in a suitable environment.
There are several reasons why fungi produce spores:
Dispersal: Spores are lightweight and easily carried by wind, water, or other means, allowing fungi to spread their genes over long distances and colonize new habitats.Survival: Spores are often highly resistant to environmental stressors such as extreme temperatures, drought, and UV radiation, allowing fungi to survive in harsh conditions.Genetic diversity: Fungal spores can be produced sexually or asexually, leading to genetic diversity among the offspring and increasing the chances of survival in changing environments.Find out more on fungi here: https://brainly.com/question/10878050
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Image transcribed:
The image displays a structure of fungi. Which of the following best describes the function of the structure displayed in the image below?
a Spore production
b Food absorption
C Sexual reproduction
d Asexual reproduction
which type of signaling is long-distance signaling mediated by chemicals released into the blood? bio 180
Long-distance signaling mediated by chemicals released into the blood is known as endocrine signaling.
This type of signaling involves the secretion of hormones by specialized cells called endocrine cells, which release hormones into the bloodstream to be transported to target cells throughout the body. Hormones are specific chemical messengers that interact with target cells through receptors on the surface or within the cells.
Endocrine signaling is responsible for regulating various physiological processes, including growth and development, metabolism, reproductive cycles, and responses to stress. Hormones are also involved in maintaining homeostasis by coordinating the functions of different organs and tissues. Common examples of hormones include insulin, estrogen, testosterone, and adrenaline.
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which of the following events occur(s) during excitation-contraction coupling in cardiac contractile myocytes? question 4 options: a. action potentials are initiated when norepinephrine binds to cell surface receptors b. funny channels in cardiac contractile myocytes open and cause depolarization c. ca2 binds to ryr, causing the opening of ca2 channels d. (a) and (b) are correct; (c) is incorrect e. (a), (b), and (c) are all correct
During excitation-contraction coupling in cardiac contractile myocytes, the process C occurs and not A and B.
Because this is what is known as calcium-induced calcium release, which occurs when calcium binds to the RyR and opens this channel, option c is the correct one.
Option a, is wrong since there are no neuromuscular connections in this situation because action potentials in cardiac myocytes are initiated by cardiac conducting system cells and spread through gap junctions.
Option b, is erroneous since the SA node contains amusing channels that induce the SA node to depolarize (or hyperpolarize), but not the heart contractile myocytes.
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Most animals avoid eating monarch butterflies due to their bad taste. Viceroy butterflies look very similar to the monarchs.
Which of these best explains how the viceroy butterfly benefits from looking like the monarch butterfly?
A.Viceroy butterflies are able to reproduce with the monarch butterflies.
B.Viceroy butterflies are able to deter predators in the same way as the monarch butterflies.
C.Viceroy butterflies are able to follow the migratory patterns of the monarch butterflies.
D.Viceroy butterflies are able to find additional sources of food used by the monarch butterflies.
Answer:
B
Explanation:
the answer is b because of the way it is
water functions in the body to perform muscle contractions, nerve conduction, waste elimination, joint lubrication, nutrient transport, metabolism, and proper fluid balance. select one: true false
The statement is True.
Water is an essential component of the human body, making up approximately 60% of total body weight. It plays a crucial role in various bodily functions, including muscle contractions, nerve conduction, waste elimination, joint lubrication, nutrient transport, metabolism, and maintaining proper fluid balance.
Adequate water intake is essential for optimal health, as dehydration can lead to a range of health problems, including fatigue, headaches, impaired cognitive function, and decreased physical performance. Thus, it is crucial to ensure that individuals consume enough water to maintain proper bodily functions and prevent dehydration. The recommended daily intake of water varies depending on factors such as age, sex, and physical activity level, but generally, it is recommended that individuals consume at least 8 glasses of water per day.
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E. coli has three genes that each code for different enzymes that break down lactose. Scientists conducted investigations about the production of these enzymes using samples of E. coli. Their results are shown in the table.
E. coli Investigation Results
Environment Contains Lactose Enzyme Concentration
1 Yes High
2 No Low
Which conclusion about the production of the enzymes can be determined by analyzing the scientists’ results?
A.Gene expression for the enzymes was controlled by the temperature of lactose.
B.The genes for the enzymes were expressed in equal amounts during both experiments.
C.Gene expression for the enzymes was controlled by the presence of lactose.
D.The genes for the enzymes were mutated before being expressed by the presence of lactose.
The presence of lactose regulated the production of the enzyme genes, which is the best choice.
What tRNA molecule's 3 base site is equivalent to an mRNA codon?An anticodon is a three-base sequence that a tRNA molecule introduces to the matching codon of the mRNA during translation along with a particular amino acid. The anticodon sequence uses base pairs in the anti-parallel orientation and is complementary to the mRNA.
Which of the following procedures contributes to the fundamental principle of genetics?The "central dogma" is the method by which DNA is converted into proteins. It is not a linear process, though; rather, transcription and translation are needed, with the intermediary molecule RNA.
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which two semisynthetic penicillins can be used against gram-negative bacteria? multiple select question. dicloxacillin ampicillin nafcillin amoxicillin
The two semi-synthetic penicillin used against Gram-negative bacteria are: (2) ampicillin, (4) amoxicillin.
Penicillin is the class of antibiotic drugs used to treat the bacterial infections. The several infections that can be treated by penicillin are throat infections, meningitis, syphilis, etc. The penicillin consists of antibiotics like Carbenicillin, Dicloxacillin, Nafcillin, Oxacillin, etc.
Gram-negative bacteria are the microorganisms which do not retain the stain crystal violet. These bacteria have a thin layer of lipopolysaccharide over their cell wall. Ampicillin and amoxicillin can cross the cell wall of Gram-negative bacteria and hence are used for treatment against them.
Therefore the correct answer is option 2 and 4.
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Which is the most mature from of embryonic development?
blastocyst
trophoblast
zygote
morula
Answer:
blastocyst
Explanation:
Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 40 weeks.
The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days.[3] During this stage, the zygote begins to divide, in a process called cleavage. A blastocyst is then formed and implants in the uterus. Embryogenesis continues with the next stage of gastrulation, when the three germ layers of the embryo form in a process called histogenesis, and the processes of neurulation and organogenesis follow.
In comparison to the embryo, the fetus has more recognizable external features and a more complete set of developing organs. The entire process of embryogenesis involves coordinated spatial and temporal changes in gene expression, cell growth and cellular differentiation. A nearly identical process occurs in other species, especially among chordates.
Humans often change ecosystems as a result of population growth, consumption, and technology. Which of the following exemplifies a way in which humans modify ecosystems?
Answer:
what are the options
Explanation:
Answer:
A
Explanation:
Trees are cut down for wood and then to extend them to houses
in the absence of ascorbic acid, prolyl oxidase is unable to oxidize proline residues in collagen to hydroxyproline, resulting in:
Prolyl oxidase is unable to convert proline groups in collagen to hydroxyproline in the absence of ascorbic acid.
Without hydroxyproline, collagen cannot make collagen fibers correctly. Hydroxyproline is an essential part of collagen. Defective collagen is synthesized as a consequence, and it is weaker and less stable than regular collagen.
Collagen loses tensile strength and flexibility due to a dearth of hydroxyproline, making it more vulnerable to harm and deterioration. This can result in several health issues, such as blood artery fragility, weakened bones, and hindered wound recovery.
Prolyl oxidase and the production of hydroxyproline both depend on ascorbic acid, also known as vitamin C. A lack of this nutrient can cause illnesses like scurvy.
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damage to the axons in the spinal cord is typically permanent and debilitating. one promising avenue of treatment is transplanting certain cells into the spinal cord after injury. which cell type is the best choice to help repair a severed axon?
One promising type of cell for spinal cord repair is the oligodendrocyte precursor cell (OPC).
OPCs are immature cells that can differentiate into oligodendrocytes, which produce myelin, the insulating material around axons that is crucial for their proper function. Injuries to the spinal cord often result in the death of oligodendrocytes and the loss of myelin, which impairs axon function and connectivity. Transplanting OPCs can promote remyelination and axon regeneration in animal models of spinal cord injury.
OPCs can also promote tissue repair and reduce inflammation by secreting various growth factors and cytokines. Therefore, OPCs have the potential to enhance the repair of axons in the spinal cord, and may represent a promising therapeutic approach for treating spinal cord injury.
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help?
Heredity Lab Report
Objective(s):
In your own words, what was the purpose of this lab?
Answer:
based on the information you have provided, the objective of the heredity lab may have been to investigate the principles of heredity, including how traits are passed down from parents to offspring and how genetic variations occur. The lab may have involved the study of traits in different organisms, such as the color of pea plants or the pattern of inheritance of genetic disorders. By conducting experiments and analyzing data, the lab may have aimed to deepen students' understanding of genetics and how it contributes to the diversity of life on Earth.
during exercise, the filling time for the ventricles is greatly shortened, however cardiac output increases. how is this best explained? group of answer choices the increase in venous return during exercise compensates for the reduced filling time stroke volume decreases but an increased heart rate compensates for it stroke volume decreases but increased contractility compensates for it none of these
During exercise, cardiac output increases due to several factors such as increased heart rate and contractility.
The reduced filling time for the ventricles during exercise is compensated by the increased contractility of the myocardium, which enables the heart to eject a larger volume of blood with each beat, despite the shorter diastolic filling time.
Additionally, during exercise, the venous return to the heart is increased due to the muscle pump mechanism, which helps to push blood back to the heart. This increased venous return also increases the preload on the heart, which helps to improve stroke volume. Therefore, the combination of increased contractility and preload compensates for the reduced filling time, allowing the heart to maintain a higher cardiac output during exercise.
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Need help explain please
Answer:
Explanation:
I'm assuming this is for choir, so what you need to do is know your "keys" such as, F Major, F Minor, etc. and start writing your solfege on where the note starts. Such as for the key of F Major, the key starts at the f note so you put your 'do' there and go up one by one and fill in your solfege.
You write your solfege down in whatever key it says, and then at the other part, you're supposed to write down do, mi, so, high do, and then go back down the same notes.
Hope this helps!
male fireflies have species specific flashing patterns to attract females; females are able to recognize the males of their species with this pattern. in some instances, six species can overlap in one geographic range (e.g., a field). what type of isolating barrier is this?
This barrier is an example of Behavioral isolation.
Behavioral isolation occurs when mismatches in mating traits (signals and/or preferences) prevent mating between two species/populations.
Members of a species cannot mate because of behavioural seclusion. It is a single mechanism among many that cause speciation. This mechanism causes behavioural divergence among population members over time. This keeps happening until they are unable to reproduce. They then split off into different types.
Behavioral isolation also stops recently diverged species from mating with each other. This prevents the two species from converging to form a new species.
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