The answer should be proteins. Because the protein is consists of different kinds of amino acids(usually 20 in total). And our cell can not produce essential amino acids itself.
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.
As populations are the smallest unit that actually evolves, it is reasonable to call them the "unit of evolution"
Answer:
the cell is 20% water, and the cells environment is 80%
Explanation:
if the water has less water than its environment the then the water will come in and out until both solutions are isotonic.
