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Fed [463]
3 years ago
9

Which scenario is an example of natural selection?

Biology
2 answers:
Elodia [21]3 years ago
8 0
It is the third one because the quiet rattle snakes are better adapted to their environment than the ones that rattle. So the ones that rattle ,which aren’t adapted to their environment, die off.
balandron [24]3 years ago
5 0
The second scenario
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Various hormones and factors (signal molecules) both influence and encourage mitosis in vertebrate animals. What processes might
Papessa [141]

Answer:

Mechanisms enabling one cell to influence the behavior of another almost certainly existed in the world of unicellular organisms long before multicellular organisms appeared on Earth. Evidence comes from studies of present-day unicellular eucaryotes such as yeasts. Although these cells normally lead independent lives, they can communicate and influence one another's behavior in preparation for sexual mating. In the budding yeast Saccharomyces cerevisiae, for example, when a haploid individual is ready to mate, it secretes a peptide mating factor that signals cells of the opposite mating type to stop proliferating and prepare to mate (Figure 15-2). The subsequent fusion of two haploid cells of opposite mating types produces a diploid cell, which can then undergo meiosis and sporulate, generating haploid cells with new assortments of genes.

Explanation:

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6 0
3 years ago
In a population of tree frogs, the allele that causes yellow eyes (Y) is dominant over the allele that causes orange eyes (y). I
polet [3.4K]

Hardy-Weinberg Principle

Genotype frequency equation

 p^{2} +2pq +  q^{2} = 1

Where p² is the freq of homo dominant genotype, 2pq is the freq of heterozygous genotype and q² is the freq of homo recessive genotype.

Allele frequency equation

p + q = 1

Where p is the frequency of dominant alleles and q is the frequency of recessive alleles.

Yellow eyes in the frog offspring is a phenotype (physical trait) that would be a expressed by a geneotype (YY or Yy). This frequency, 0.85 includes: p² + 2pq

0.85 + q² = 1

q² = 0.15

p = \sqrt{0.15} 

Then p + \sqrt{0.15}  = 1

1 - \sqrt{0.15} = p

p = 0.613

61%



7 0
3 years ago
An is a mass of a living protoplasm
AVprozaik [17]
Amoeba is the mass of a loving protoplasm
4 0
4 years ago
Which of the following statements is true concerning humans?
Mars2501 [29]

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The answer is C

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Humans just as a long variety of organisms have changed thanks to the process of evolution. This can be supported by evidence such as fossils.

6 0
4 years ago
Deep-oceanic trenches are formed a subduction
miskamm [114]

Answer:

Convergent

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In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

7 0
3 years ago
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