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>
Answer:
corona ke din chale gaye dî•,•

Structural adaptations are biological characters of an organism like the bill on a bird or the fur on a bear. Other adaptations are behaviour.
<h3>Define adaptation?</h3>
Adaptation, the method by which a species becomes adapted to its surroundings; it is the outcome of biological selection's acting upon heritable divergence over various generations.
Thus,Structural adaptations are biological characters of an organism like the bill on a bird or the fur on a bear.
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<span>Surface of planetary bodies such as the moon , mars or even the earth
A large portion of the items originate from space rocks, which are objects made of different sorts of shake and have existed since the starting point of the nearby planetary group. A little rough or metallic lump of material that movements through space is known as a meteoroid. Small meteoroids (the measure of clean) are regularly alluded to as micrometeoroids or space tidy. These sections may likewise be extra comet flotsam and jetsam, or were shot out in impacts between other close planetary system bodies, such as mars.</span>