Cell has cell membrane<span> (also known as the </span>plasma membrane<span> or </span>cytoplasmic membrane<span>) it is a </span>biological membrane<span> that separates the </span>interior<span> of all </span>cells<span> from the </span>outside environment.<span> The cell membrane is </span>selectively permeable<span> to </span>ions<span> and </span>organic molecules<span>and </span>controls the movement of substances<span> in and out of cells.</span><span>The basic function of the cell membrane is to protect the cell from its surroundings.</span>
All of Darwin’s observations would prove this theory true.
Answer:
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<em><u>Amniotic</u></em><em><u> </u></em><em><u>fluid</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>fluid</u></em><em><u> </u></em><em><u>which</u></em><em><u> </u></em><em><u>surrounds</u></em><em><u> </u></em><em><u>fetus</u></em><em><u> </u></em><em><u>within</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>amnion</u></em><em><u>.</u></em>
<em><u>Hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em>
Natural selection is species survival and reproduction due to differences in some traits that give them an advantage over others