Controls the movement of substances in and out of cells<span>. The basic </span>function<span> of the </span>cell membrane<span> is to protect the </span>cell<span> from its surroundings.
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Answer:
equal to the sum of its parts.
Explanation:
Required
Which option answers the question?
The mass of an object is the total amount of matter in that object. When the term total amount in describing a concept, it means the summation of all its constituents.
In fact, that is the reason why the mass of an object is always constant because it is independent on gravity.
Take for instance, a brick.
Every part of the brick contribute to the mass of that brick and whenever the brick loses some of its part, either through wear and tear or any other means, the brick loses the mass of the lost part.
Hence, from the list of given options; option B is correct.
