<span>The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.
</span>
Answer: C. A substrate
Explanation:
A substrate is a substance on which an enzyme act. The enzyme acts on substrate X and converts it to Y.
The function of the plasma membrane is to only allow certain items through, while blocking the rest.
<u>Answer:</u>
The correct answer option is: frequency of the recessive allele.
<u>Explanation:</u>
When there are no mutations, no selective forces, no gene flow, no non-random mating and large population size, the population is said to be in Hardy- Weinberg equilibrium.
When Hardy-Weinberg equilibrium is met, it is written in the form of an equation which is as follows:
where 
represents the frequency of the homozygous dominant allele, 
is the frequency of the heterozygous allele while q or
represents the frequency of the homozygous recessive allele.
Protein is made up of subunits and each subunit is made up of polypeptides molecules . Called Amino acids .
