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docker41 [41]
3 years ago
8

Identify the four postulates of natural selection.A challenge to traditional (pre-1860) ideas about species came from embryology

, when it was discovered that _____.
Biology
1 answer:
victus00 [196]3 years ago
7 0
<h2>Postulates of natural selection</h2>

Explanation:

  • Early in development, all vertebrate embryos are remarkably similar. The similarities among the embryos imply that the development of all vertebrates (having a backbone) evolved as new genetic instructions were placed on  Top of older ones.
  • The chick embryo is on the right. It is easier to compare a newly hatched chick and a newborn baby. After birth, a backbone or vertebrae are clearly visible, as are legs, a mouth, a pair of eyes, etc. The chick’s  Skeletal system, in general, has multiple similarities to ours, including having one bone in the upper leg and upper wing and two bones in the lower leg and lower wing. This mimics our arm and leg skeletal structures.
  • Mammals, birds, reptiles, and fish, look very similar at the earliest stages of growth inside the womb of the mother animal.Vertebrate embryos begin developing similar features due to related ancestors. As the embryo grows, it may drop some of these ancestral traits as the genetic code becomes more specific for that species.

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Explanation:

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3 years ago
You are observing a tissue under the microscope and see long, cylindrical, striated, multinucleate cells, arranged parallel to e
Colt1911 [192]

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7 0
4 years ago
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Give an example of how migration affects population size?
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3 years ago
1. A man with hemophilia (a recessive, sex-linked condition) has a daughter without
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A man with hemophilia (a sex-linked recessive condition) has a daughter without hemophilia, the probability of their children having hemophilia is 50%, out of 4 children probably 2 will have hemophilia and 2 will not have hemophilia.

<h3>What is recessive and dominant?</h3>

The dominant term is related to the genetic transmission of a trait and is represented, in biology, by a capital letter (A, B or V). While recessive, represented by a lowercase letter (a, b or v), they represent genetic traits transmitted only in the absence of the dominant gene.

With this information, we can conclude that Recessive genes produce proteins considered “defective” as they become inactive. That is, they are hidden (recessive) with the presence of a dominant gene manifesting their characteristics in the absence of their dominant allele.

Learn more about Recessive genes in brainly.com/question/15481938

#SPJ1

5 0
2 years ago
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