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kari74 [83]
3 years ago
5

What is Immigration​

Biology
1 answer:
matrenka [14]3 years ago
4 0

Answer:

the answer is B i am confident

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Which cell structures are found in plant cells, but not in animal cells?
Levart [38]

Answer:

The one I know is plant cell has no cell wall while animal cell have cell wall

8 0
3 years ago
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A student puts drops of Lugol's iodine solution into the water in the beaker shown. The water turned red. After a short time, th
pantera1 [17]

Answer:

Cell membrane as  a semi permeable membrane.

Explanation

A semi permeable membrane is the one that would only allow water,ions  and certain molecules to pass through it  by diffusion while restricting other  large molecules from passing through.

Details in the attachment.

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8 0
4 years ago
Explain why the ratio of motor neurons to muscle fibers is greater in muscles that control eye movement than in postural muscles
EleoNora [17]

Answer:

The muscles of the eye cover a greater number and in turn carry out greater fine motor skills.

Explanation:

Alpha motor neurons are neurons that invent the skeletal muscle, that is, striated, so that through the motor plate that is the unit that unites them, an action potential is transmitted that contracts the sarcomeros of the elastic fibers and the z lines. come closer, each eye movement is much more precise than the locomotion of the lower limb, which carries greater innervation in each muscle bundle due to the specificity of the movement, this is how more alpha motor neurons are required to mobilize the eye than a leg.

7 0
3 years ago
An alpha helix or a beta-pleated sheet are examples of what level of protein structure?
weqwewe [10]

Answer:

Secondary level of protein structure

Explanation:

The proteins are formed of the monomer units called amino acids which bond with each other via peptide bond and form a linear peptide structure called the primary level structure of the protein.

The proteins to perform several functions in a cell undergoes structural conformation and attain the helical form called alpha helix due to the involvement of alpha carbon in bond formation and a pleated sheet called beta-pleated sheet due to the involvement of beta carbon. These structures are known as a secondary level of protein structure.

Thus, a Secondary level of protein structure is the correct answer.

4 0
3 years ago
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As you look out across the vast canyon, you notice a bright red layer of sediment across the canyon for as far as you can see. Y
mixer [17]

I think it B. but I don't know if its correct or not.


...


I see you got this from k12 too.

3 0
3 years ago
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