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Leni [432]
3 years ago
10

How many atoms make up a whale?

Biology
1 answer:
omeli [17]3 years ago
3 0
16747400 celle they permit exchange between the external atmosphere and the circulatory system
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nikdorinn [45]

Answer:

Pollen is caught by the stigma and then tunnels down through the style to fertilize the ovules in the ovary.

Explanation:

4 0
3 years ago
Place each of the terms in the proper category to identify whether they arise from the ectoderm, mesoderm, or endoderm. thyroid
andriy [413]
Each of the term is identified whether they arise from the ectoderm, mesoderm or the endoderm.

The thyroid arises from the endoderm.
The thymus arises from the ectoderm.
The anterior pituitary arises from the ectoderm.
7 0
3 years ago
Mastering biology use the completed punnett square in part b to answer the questions below about the f2 generation. answer each
Sav [38]
<span>1) The probability of F2 seed chosen at random will be yellow is the same as asking about the probability of forming a yellow seed in that generation. The answer is 3/4 (75%) because 1/4 = 25% GG is homozygous dominant and the rest 2/4 = 50% Gg are heterozygous.

2) In the F2 generation there are two genotypes that will breed true, which is homozygotic genotypes: GG and gg. But of these two, only one of them is yellow. The answer is 1/3 because from all the yellow seeds that resulted (GG, Gg and gG) only one has the genotype for true breeding.

3) The probability of taking out three seeds in which a least one is yellow can be calculated by subtracting the only  probability that doesn't fit the criterion, which is taking out a green seed 3 times: \frac{1}{4} * \frac{1}{4} * \frac{1}{4}  = 1/64.
 Then substract that to 1 1-  \frac{1}{64} = \frac{63}{64}

4) there are three possible groupings in which the green is taken once and the yellow seeds taken twice. The first possibility (follow the example) is the green being the first to come out, another possibility is being the second and the last possibility is being taken in the third time.
For example, Green yellow yellow- probability : </span>
<span><span><span>\frac{1}{4} * \frac{3}{4} * \frac{3}{4}</span> = 9/64

This is one possibily, but since there are 3, multiply it by 3 and you obtain the final answer:2</span>7/64. </span>





4 0
4 years ago
Read 2 more answers
During which phase of mitosis do chromosomes become condensed and appear visible?
zysi [14]
<span>Prophase they begin to condense, that's when you will actually be able to see them.</span>
6 0
3 years ago
Natural selection that changes the distribution of a trait to favor one extreme phenotype is called.
jarptica [38.1K]

Answer:

<h2><u>directional selection</u></h2>

Explanation:

This type of natural selection is referred to as . In this type of natural selection, either one phenotype is preferred or the other; therefore, there is no equilibrium between the populations of the phenotypes that are present.

Examples of organisms that have undergone directional selection are black bears during the ice ages, African chichlid and sockey salmon.

8 0
3 years ago
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