<span>I believe the answer is: D. proteins
The main functions of these proteins is to allow specific substance to pass through the membrane of the cells which needed for the energy formation for cells'functions.It created through the combination of more than 20 amino acids with different functions.</span><span />
Answer:
Cell
Explanation:
Cell the essential membrane- bound unit that contains the key particles of life and of which every living thing are formed.
These cells collaborate with other specific cells and become the structure squares of huge multi cell living beings, for example, people and different creatures.
The levels of organization range from a single organelle all the way up to a highly structured hierarchy.cell governs all physical and chemical process in life.
Its Unipotent !! C!! the word itself describes if you try to understand!!
So that there is more gene variation. Let's say if they all had the same genes, one specific disease would be fatal for the species' existence since they would all be the same. The diverse gene pool allows species to develop different characteristics that can help them defend against disease