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-Dominant- [34]
3 years ago
9

The key lesson learned by the fact that thalidomide showed no impact when tested on prenatal rabbits but led to birth defects in

prenatal humans is that
Biology
1 answer:
drek231 [11]3 years ago
3 0

Answer: Here are the options.

A. Teratogens impact different genotypes differently.b.teratogens impact specific aspects of development.c.teratogen effects may not emerge until later in life.d.teratogen effects are the same regardless of the time when the individual is exposed.

The key lesson is that teratogens impact different genotypes differently or in different ways.

Explanation:

thalidomide is a tetratogen , a substance that will have a physical or functional defect on an embryo after the pregnant mother is exposed to the substance. This disturb the physical development of the child. It became popular to treat morning sickness in pregnancy but was discovered to result in major limb deformities;

Tetratogen impact different genotypes in different ways because different genotypes have different ways they respond to tetratogens because of their level exposure and subscetability. This the main reason thalidomide showed no impact when tested on prenatal rabbits but led to birth defects in prenatal humans. The genotypes of prenatal rabbits are not subscetiple to tetratogens compare to that of the developing embryo on exposure.

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If humans had been present to build log structures during the Carboniferous period (though they were not!), which plant types wo
aliina [53]

Answer:

The plant types suitable during that period would be ferns, horsetails, and lycopods.

Explanation:

A geologic period and system, which covers 60 million years from the termination of the Devonian period to the start of the Permian period is known as the Carboniferous period. During the Carboniferous period, the plant life was luxuriant and extensive, mainly at the time of Pennsylvanian. It comprises ferns and fernlike trees, that is, the giant horsetails known as club mosses, calamites, or lycopods like Sigillaria and Lepidodendron.  

Thus, if humans had been present to construct log structures during the Carboniferous period, then they would have used logs of ferns, horsetails, and lycopods for construction work.  

8 0
3 years ago
How do seismic waves help scientists understand Earth's layers? Select the two correct answers. (1 point)
qaws [65]

Seismic waves help scientists understand Earth's layers by:

  • Scientists can observe how seismic waves change speeds when passing through different layers.
  • Scientists can observe which seismic waves cannot pass through certain layers.

<h3>What are Seismic waves?</h3>

These are waves which are generated as a result of the movement of

materials in the earth. They change speed as a result of the collision with

materials in the earth and know the types of material present as a result of

some types not being able to pass through certain medium.

Read more about Seismic waves here brainly.com/question/8553835

4 0
2 years ago
Which of the following options describes a morula? THANKS FOR THE HELP!
stiv31 [10]

Answer:

A

Explanation:

4 0
3 years ago
Acording to erikson what is the first stage of psychosocial development?
Lilit [14]

Answer:

The answer would be trust .vs. mistrust

Explanation:

This is the first stage

Mark as branliest please :)

7 0
3 years ago
What environment would be least likely to grow bacteria and why? Here are your choices:
storchak [24]

Answer:

3.

Explanation:

A classroom desktop is the least likely to grow bacteria because it is a relatively clean surface. The armpit of a human and a warm freshwater mud puddle are a more suitable habitat for bacteria because they are warm, and provide a relatively safe environment for them

3 0
3 years ago
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