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Vikki [24]
3 years ago
12

A mutation is _____.

Biology
2 answers:
fomenos3 years ago
7 0
All of the above should be the answer since mutation is is a change of the DNA sequence that are resulted from DNA copying mistakes made during cell Division, or even exposure to ionizing radiation
Paraphin [41]3 years ago
5 0

Answer:

all of the above

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What are the body’s three defenses? How do they differ from each other.
Artemon [7]

Answer:

- Physical and chemical barriers

- non-specific innate responses

- specific adaptive responses

<u>The differences are...</u>

The first barrier is the physical and chemical barrier. It is the first line of defense when in contact with outside sources, this can be through the skin, earwax, nose-hair, etc.

The second barrier, the non-specific innate response, is after these outside sources have somehow managed to pass through the first barrier. They come into contact with cells and enzymes that help to defeat them.

The third barrier, the specific adaptive response, is the body's way of dealing with pathogens that the body has encountered before. (B cells activate)

8 0
3 years ago
Assume that the mother's genotype is AZ/az, and the father's genotype is Az/aZ, and the recombination rate is 10%. What are the
attashe74 [19]

Answer:

0.45 from mom and 0.05 from dad.

Explanation:

The recombinant progeny might occur due to the crossing over at the time of meiosis in which the exchange of chromosomes occur in the homologous chromosomes of non sister chromatids.

The progeny receives half of their chromosome from the mother and half from the father. The mother 50% AZ and 50% az chromosomes respectively. The 10% recombination has occured due to which the mother chromosomes is reduce upto 45%. The recombinant  10% will be aZ and Az and has 5% frequency. Mom has the ability of az chromosomes is 0.45 %. The father has the genotype 50% Az and 50% aZ. The 10% recombination has occured due to which the father chromosomes is reduce upto 45%. The recombinant will be az and AZ with 5% frequency. So, father has az with 0.05 % probability.

Thus, the answer is 0.45 from mom and 0.05 from dad.

8 0
3 years ago
What happens to matter and energy in a food chain and food web?
dusya [7]
It gets transferred through out animals
hope this helps
4 0
4 years ago
Which best illustrates how Gregor Mendel used creativity that lead to scientific discovery?O He noticed that traits were passed
Svet_ta [14]
<span>As I know Gregor Mendel - Austrian naturalist, botanist and a religious leader, a monk, founder of the doctrine of heredity (Mendelism). By applying statistical methods for the analysis of results of the hybridization of pea varieties, formulated the laws of heredity. In 1856, Mendel began his experiments in crossing different varieties of peas, differing in a single, strictly defined criteria (for example, the shape and color of seeds). Precise quantitative account of all types of hybrids and statistical processing of the results of experiments that he conducted for 10 years, allowed him to formulate the basic laws of heredity - the splitting and combining of hereditary "factors". Mendel showed that these factors are separated and not crossing merge and disappear. Although the crossing of two organisms with contrasting features (for example, yellow or green seeds) in the next generation of hybrids appears only one of them.</span>
7 0
3 years ago
Expand (x+13)(x+20)​
Murljashka [212]
2x +33 is the answer
4 0
3 years ago
Read 2 more answers
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