I believe the anwser you are looking for is the
Cell Membrane.
It is a substance that lets things in and out of the cell
Answer:
C
Explanation:
You do this thing that is this that you have to do by doing that thing with the things so you get a thing. Got it?
The cell membrane<span> is selectively permeable to ions and organic molecules and controls the movement of substances in and out of </span>cells<span>. The basic function of the </span>cell membrane<span> is to protect the </span>cell<span> from its surroundings. It consists of the phospholipid bilayer with embedded proteins.</span>
The stem cells possessing the characteristic of self-renewal and limited differentiation are present in the amniotic fluid.
The cells present in the amniotic fluid are capable of forming a wide array of different cells. However, they are not pleuripotent, but when grown in the right environment they can form brain, liver, fat, blood vessels, bone and muscle cells.
Hence, the answer is 'Option C - amniotic fluid'.
Using the Hardy-Weinberg equations, the percentage of carriers of cystic fibrosis is 8.19%.
<h3>What are the Hardy-Weinberg equations?</h3>
The Hardy-Weinberg equations describe the relationship between alleles in a population that is fairly constant.
The Hardy-Weinberg equations are given below as;

Hardy-Weinberg equations
Percentage of carriers = 2pq
Percentage of carriers = 2 * 0.09 * 0.91 * 100 = 8.19%
Therefore, the percentage of carriers of cystic fibrosis is 8.19%.
Learn more about Hardy-Weinberg equations at: brainly.com/question/16039271
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