Answer:
Crossing over is a process in which exchange of segments occur.
Explanation:
Crossing over is a process in which two non-sister chromatids of homologous chromosomes exchange the segments of genetic material with each other during meiosis. Due to this process, variation occurs in an organism.
Independent assortment is a process in which different alleles are sorted to different gametes which occurs independently and does not effect one another. This process occurs in metaphase of meiosis l.
Joining of sex cells is a process in which sex cells of male and female join together formed a zygote which turn into a new organism. These sex cells are formed during meiosis which are haploid in nature.
Mutation and crossing over are the factors that cause inherited genetic variations within populations.
Sudden change occurs in the genes of an organism due to the exposure of the cell to radiation or chemicals.
In the body, the homeostasis of which element is related to properties of bone?
Answer:
Homeostasis of calcium
Explanation:
Bone homeostasis is a complex process by which osteoclasts resorb bone and osteoblasts engage in new bone tissue formation. This sequence has to be controlled and and planned in order to maintain skeletal integrity of bones.
Calcium homeostasis is related to bones physical properties because play a crucial role in skeletal muscle maintenance by acting as mitogen-activated protein kinase (MAPK) signaling effector and other different pathways that is responsible for regulating cell proliferation, differentiation, and cytoskeletal restructuring .
In the body, the homeostasis of Calcium element is related to properties of bone
What is Bone homeostasis?Bone homeostasis is defined as the dynamic equilibrium which is maintained by the regulatory functions of the three major bone cells, osteoclasts, osteoblasts and osteocytes, as long as the activities of these cells are properly adjusted, therefore the net bone mass is maintained.
Calcium homeostasis is related to the physical properties of bones as it plays an important role in skeletal muscle maintenance by acting as an effector of mitogen-activated protein kinase (MAPK) signaling and various other pathways that regulate cell proliferation, differentiation and cytoskeletal reorganization.
Thus, in the body, the homeostasis of Calcium element is related to properties of bone.
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Of the three major groups of forensic science professionals, which of the following provide specific knowledge in an area of science, such as botany or anthropology? A. associate scientists B. forensic pathologists C. forensic scientists D. forensic odonatologist
Answer:
A. associate scientists
hope this answer correct (^^)..
Answer:
answer A
Explanation:
Which of the following particles has a negative charge?
A.
Nucleus
B.
Neutron
C.
Electron
D.
Proton
Answer:
C. Electron (e-) has a negative charge
Answer:
c
Explanation:
Compare and contrast the contributions of Neel, Pauling, and Ingram to our understanding of the genetic and molecular basis of sickle cell disease (SCD).
He demonstrated that SCD and sickle cell trait were due to the presence of abnormal 8-globin polypeptides in red blood cells. He demonstrated that the electrophhoretic mobility of B-globin from patients with SCD was different from that of healthy individuals. He demonstrated that both parents of multiple patients with SCD had low levels of sickled red blood cells. He hypothesized that SCD was a recessive trait and that the parents of patients with SCD would be heterozygous carriers. He demonstrated that the difference between B-globin polypeptides in individuals who were healthy and those with SCD is an amino acid substitution. He performed a peptide fingerprint analysis on B-globin from individuals with 84 84 and 89 88, which identified the segment of B-globin that was changed by the BS mutation. James Neel Linus Pauling Vernon Ingram
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Natural proteins most commonly contain linear polypeptides between 100 and 1000 residues in length. One of the reasons polypeptides outside this range may be disfavored is that
B) smaller polypeptides do not form stable folded structures.
If one DNA strand is 5'-GGCATTACACTAGGCCT-3', what is the complementary srand?
Answer:
3' - CCGTAATGTGATCCGGA - 5'
Explanation:
In DNA, the leading strand builds from a 5' to 3' direction and the lagging strand (complementary strand) must build from a 3' to 5' direction.
The base-pairing rules for DNA are:
- adenine always pairs to thymine (A to T) (T to A)
- guanine always pairs to cytosine (G to C) (C to G)
In pea plants, purple flower color, C, is dominant to white flower color, c. The table shows the frequencies of the dominant and recessive alleles in three generations of peas in a garden. Allele Frequency for Flower Color in Peas Generation p q 1 0.60 0.40 2 0.64 0.36 3 0.75 0.25 4 0.80 0.20 Which generation showed the greatest frequency of having one of each allele? generation 1 generation 2 generation 3 generation 4
Answer:
Generation 1: p= 0.60 q= 0.40
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached file
Answer:
a.) (generation 1) on edg.
Explanation:
got it right
good luck!
The genomic DNA of an organism has a base composition of 40% C-G base pairs and 60% A-T base pairs. Assuming a random sequence of bases, what is the expected frequency of the Tsp E1 restriction sites 5'-CCGG-3'?
Answer:
The correct answer is (0.2)^4.
Explanation:
Based on the given information, the given genomic DNA is A-T rich, and the base pair composition is C-G = 40 % and A-T = 60%. Therefore, as per Chargaff's rule, Each C and G will possess 20%, and each A and T will possess 30%.
Therefore, the probability of each base will be,
C = 20/100 = 0.2
G = 20/100 = 0.2
A = 30/100 = 0.3
T = 30/100 = 0.3
Now the expected frequency of the Tsp E1 restriction sites 5'-CCGG-3' will be 0.2 * 0.2 * 0.2 * 0.2 = (0.2)^4.
How are vascular tissues arranged in dicot stems?
1. Hypothesize in what type of environments it would be advantageous for a protist to be autotrophic, heterotrophic, or mixotrophic.
Answer:
See below
Explanation:
Protists fall into the category of eukaryotes. They are diverse in nature and typically are found to be single celled organisms containing very organized structures.They are classified based on what is their source of nutrition.
Autotrophic - capable of photosynthesis to produce their own food, so an environment where sunlight, CO2 and water is available.
Heterotrophic - feed on other organisms , an environment where prey is plenty and very limited or no access to sunlight.
Mixotrophic - a combination of the above two, an environment with all of the aforementioned factors present.
Alex was energetic once he learned to walk, getting into anything he could find. He soaked in every piece of new information, seeming to learn a new skill every day. But after he turned 2, he became lethargic and inattentive. This coincided with his becoming a much pickier eater; he primarily consumes hot dogs with no bun, fast food French fries, and candy. As a result of this diet, he may have developed . Adding ________ to his diet may help reverse his symptoms.
Which of the following are effects of lead poisoning in infants and children?
a. Slowed body growth
b. Type 1 diabetes
c. Impaired hearing
d. Reduced IQ
e. Kidney damage
Answer:
All but B are primary symptoms of lead exposure in children and infants
Explanation:
The effects of lead poisoning in infants and children are:
Slowed body growthKidney damageImpaired hearingReduced IQLead is commonly as joint toxicant that affects multiple body systems and is very harmful to young children.
Lead that is present the body is spread to the brain, liver, kidney and bones.
When it is stored in the teeth and bones, where it gathers over time.
Human exposure is usually measured through the measurement of lead in blood.
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Complete the following statements to assess the understanding of how drugs increase the effect of a neurotransmitter at a synapse. Not all choices will be used.
Most illicit drugs affect the nervous system by affecting the action of a particular neurotransmitter at _____ in the brain. Drugs that increase the likelihood of neuron excitation are called _____, and those that decrease that likelihood are called _____.
Specific ways that a drug could increase the effect of a neurotransmitter (NT) at a synapse include 1) causing the NT to leak out of a synaptic _____into the synaptic cleft; 2) preventing _____ of the NT presynaptic membrane; and, 3)blocking an _____that normally breaks down the NT.
Word Bank:
acetylcholine
delays
depressants
dopamine
equal
excitement
larger
release
stimulants
synapses
vesicle
reuptake
enzyme
What does DNA provide the code for?
nitrogenous base pairing
protein synthesis
deoxyribose formation
nucleotide synthesis
Answer:
Protein Synthesis
Explanation:
DNA provide the code for protein synthesis.
This DNA code contains the instructions needed to produce the proteins and molecules essential for our growth, development and health.
Protein synthesisProtein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes three steps: initiation, elongation, and termination.
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36% of your study population are h recessive for fingernail growth rate. Using the Harvey Weinberg equilibrium equations (P+Q = 1 and P2+2PQ+Q2 = 1), calculate the frequency of h dominants and heterozygotes in your population.
Answer:
frequency of h dominant = 16%
Frequency of heterozygotes = 48%
Explanation:
The computation of frequency of h dominants and heterozygotes in your population is shown below:
Since it is mentioned that
q^2 = 36%
So q = 0.6
And
p + q = 1
So, the p is 0.4
Now the frequency of h dominant is
= p^2
= (0.4)^2
= 16%
And, the heterozygotes in the population is
= 2 × p × q
= 2 × 0.4 × 0.6
= 48%
1. Explain why some heterotrophs can be described as both a primary consumer and a secondary consumer. What are these heterotrophs called
Answer:
Heterotrophic species that eat organisms from different trophic levels
Explanation:
Humans are examples of primary and secondary consumers because we are able to eat different types of living forms, thereby acting in the food chain as primary consumers (eating plants) in certain conditions and as secondary consumers (eating animals) in different conditions. Many heterotrophic organisms act at different levels by feeding primary producers and primary consumers based on specific trophic strategies. In consequence, the classification between primary and secondary consumers is arbitrary since it varies according to the trophic strategy adopted by the organism.
Which could best be used to explain why bacteria can infect a person very quickly? outer capsule binary fission protective covering genetic recombination
The reason why bacteria can infect a person very quickly is because of the process of binary fission.
What is binary fission?
Binary fission is defined as the reproduction process that is found in prokayotes such as the bacteria.
The binary fission involves these steps:
Replication of DNA (deoxyribonucleic acid),Growth of a cell,Segregation of DNA and Splitting of cells.The final stage which is the splitting of cells leads to the formation of many daughter cells of the parent bacteria cell which can eventually led to infection.
Therefore, the reason why bacteria can infect a person very quickly is because of the process of binary fission.
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Answer:
Which could best be used to explain why bacteria can infect a person very quickly?
x. outer capsule.
√. binary fission is the right one.
x. protective covering.
x. genetic recombination.
Explanation:
I got 100% on the test
⬆️ plus the person above is correct ⬆️
Art-Labeling Activity: Components of blood.
Explanation:
Blood is a specialized body fluid. It has four main components: plasma, red blood cells, white blood cells, and platelets.
Please help I need to finish this fill in the blank ASAP
Answer:
make a prediction collect the data analyze the data and conclude/ verify the hypothesisAnswer:
I'm not sure what options are available for this but this is what I think.
Explanation:
Create or make a prediction
I
I
v
Conduct an experiment to test the hypothesis
I
I
v
Collect data
I
I
v
Analyze data and come up with a conclusion
Hope this helped and good luck! :)
The nerve cells in your body must constantly remove substances from the cell against the concentration gradient. What type of process most likely takes place to remove substances from a cell against the concentration gradient? Explain.
Answer and explanation:
Active transport refers to a procedure, which withdraws substances from a cell against the concentration gradient. During the process, the molecules move from low concentration to a high concentration.
The mechanisms of active transport need the application of the energy of the cell, generally in the form of ATP. If a substance needs to move within the cell against its concentration gradient, that is, if the substance's concentration within the cell is more than its concentration in the extracellular fluid, then the cell must utilize energy to move the substance.
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How does the vessel diameter of the afferent arteriole change in order to decrease glomerular hydrostatic pressure (GHP) and restore the glomerular filtration rate (GFR) to normal
Answer:
The afferent vessel will generate vasodilation, that is, increase its diameter to generate a stirring effect in the glomerulus, promote glomerular filtration and decrease pressure in it.
Explanation:
The renal glomeruli are in charge of filtering the blood.
They have an efferent vessel that collects the blood to be filtered and an afferent that is in charge of returning it to the bloodstream of systemic circulation.
When the pressure of the glomerulus is very high, the glomerular filtration rate is increased and it needs to be regulated, that is why the afferent vessel undergoes vasodilation to decompress the glomerulus pressures and thus regulate the filtration rate by decreasing it.
In both photosynthesis and respiration, _______ synthesis is coupled to the diffusion of protons across a membrane from high to low concentration.
Answer:
ATP is the answer
Which conclusion about Paradoxides pinus is supported by the information in the table? Life forms existed during the Cambrian period. Similar fossil species formed after the Devonian period. This fossil species first appeared during the Cenozoic era. Different life forms were surviving during Precambrian time.
Answer:
a
Explanation:
Life forms that existed during the Cambrian period are the conclusions about Paradoxides pinus, hence option A is correct.
What is a Cambrian period?The Cambrian period is the period when most of the life forms on the earth explode to the different types of animals and plants, in this period most of the separate families of this species are evolving rapidly.
The species occur in this period in which Paradoxides pinus also appears, it was supposed to be a trilobite that lived during the mid-Cambrian.
Paradoxides pinus has a semicircular and elongated body shape, it is hard from the outside due to the exoskeleton, but the inside is soft making it boneless.
Therefore, in the Cambrian period life forms, which are the conclusions about Paradoxides pinus.
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I don't know how to edit my original question, so I am resubmitting it. I have attached a photo with my question. I had it attached it last question too. I'm not sure if it isn't showing up. I really need help. The instructions are to label the arrows in the slide image below with the appropriate stage of the cell cycle.
Answer:
The correct answer is -
A: Prophase (top left)
B: Cytokinesis (top middle)
C :Interphase (top right)
D :Telophase (bottom left)
E: Metaphase (bottom middle)
F: Anaphase (bottom right)
Explanation:
A. prophse - the first stage of mitosis, in this pahse the chromatin which is DNA and proteins, condenses in nucleus.
B. Cytokinesis - It is the physical sepration or dividion of cytoplasm of the parental cell.
C. Interphase - This phase have no change in cell except its size as it grows and enlarges itself.
D. Telophase - formation of a nuclear membrane around chromosome set to separate the genetic material from the cytoplasm.
E. Metaphase - visible chromosomes, removal of nucleus and chromosomes present in cytoplasm.
F. Anaphase - replicated chromosomes are separated and move towards opposite poles.
What do you think would happen if there was more glucose (sugar) than available NAD+? Explain.
Answer:
n people who have developed diabetes, glucose builds up in the blood, resulting in hyperglycemia. ... And, too much sugar in the bloodstream can cause other types of damage to body tissues, which can increase the risk of heart disease and stroke, kidney disease, vision problems, and nerve problems in people with diabetes.
Explanation:
b. (state a differences between blood and inter cellular fluid
What will most likely happen to the population of moths in this habitat?
Answer:
Genetic variation will increase because of a new habitat and food source. What will most likely happen to the population of moths in this habitat? The moths will evolve due to a selective pressure. ... Population changes are driven by competition and sexual selection.
Explanation:
Be the man he always wanted you to be
Answer:
See below
Explanation:
There are two factors that predominantly influence what type of a person one will become: nature and nurture. Nature refers to the genetic material inherited from the parents, while nurture is the environment in which the person is brought up. Now if this 'he' in question is the biological father, it may well be referring to being the kind of person his father was or have the kind of values he instilled into him during his upbringing while he growing up.
How can changes on earths surface affect changes below surface
Answer:
There are several changes that occur on the earth's surface but also affects the changes below the surface, some of them are as follows:
When rainfall occur on the sandy surface on earth, it looses the soil under the surface and can cause landslides.Imbalance in the food chain above or on the earth surface can affect the nutrient quantity below the surface that is essential for soil bacteria and other microorganisms.Deforestation can also loosen the soil and soil under surface can shift its position.Use of chemicals on agriculture surface can lead to change the fertility of soil below the surface.Based on what you learned about the main elements
in living things, which element do you think forms the
main structure
of organic molecules?
A. Oxygen, because it is the element present in
highest amount in living things
B. Carbon, because it readily forms long chains and
rings
Answer:
A
Explanation:
it is composing about 65% of the human body
Answer:
B
Explanation:
Because it's right.
Morphine, heroin, and methadone
a. are stimulants
b. are derived from opium
O c. are often used to treat ADHD
d. increase the action of the central nervous system
Answer:
b. are derived from opium
Explanation:
Morphine, heroin, and methadone are the name of drugs which are derived from the same source called opium poppy.
Morphine, heroin, and methadone are the class of drugs known as opioids or narcotic are used in medical treatment which interacts with brain to reduce pain perception and methadone is also used to reduces withdrawal symptoms due to addiction of heroin and morphine.
Hence, the correct answer is b.