Answer:
b.
Explanation:
Random forces lead to genetic drift. Sometimes, there can be random fluctuations in the numbers of alleles in a population. These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over 
 
        
             
        
        
        
Contractile means the ability of an organism to<u><em> withhold, reduce in size or shrink. </em></u>
<u><em /></u>
<u><em /></u>
A contractile vacuole will help this organism better survive in its moist environment by <u><em>preventing or stopping the cell from absorbing too much water from its moist environment.</em></u>
<u><em /></u>
<u><em /></u>
- A contractile vacuole is an <em>organelle</em> that can be found in organisms that are said to be <u><em>single-celled (Unicellular organisms).</em></u>
- One of the primary functions of a contractile vacuole is to absorb <u><em>excess water</em></u> from the protoplasm in the unicellular organism and release this water to the surrounding environment. 
- A contractile vacuole can be called the excretory organ of unicellular organisms. This is because it is involved in <u><em>osmoregulation.</em></u>
<u><em /></u>
- A contractile vacuole will help this organism better survive in its moist environment by <u><em>preventing or stopping the cell from absorbing too much water from its moist environment.</em></u>
<u><em /></u>
To learn more, visit the link below:
brainly.com/question/2701222
 
        
             
        
        
        
It is the respiratory system 
        
             
        
        
        
Answer: Mitochondrial proteins are generally involved in mitochondrial functioning and the functions they carry out
Explanation:
Mitochondrial proteins are synthesized in the cortisol by the ribosomes and are delivered as precursors to the mitochondria before folding and remodeling processes takes place which are carried out by the chaperones. 
Mitochondrial proteins which resides in the matrix and the cristae are involved generally in mitochondria functions such as carrying the reactions in the electron transport chain among others. 
The proteins which are already active at the cortisol may remain there, which is why it is advantageous for the proteins to be in their precursor state so that they will be properly targeted to the matrix to be synthesized and to function.