Answer:
Selectivity in choosing a mates
Geographic barriers separating subpopulations.
Explanation:
Selectivity in choosing a mates is a factor in which individuals can mate with each other. Some individuals tend to choose a sexual mates that posses some traits or characteristics that attract them to each other and because of the observable character, similar individuals attracted to each other mates.
Geographic barriers separating subpopulations is another factor that make similar organism or individuals to mates.
When there is geographic separations or demarcation between individuals in a species and they are separated from other subpopulations .. They tend to mate with each other in the same geographic location and cannot mate with other subpopulations that is outside their own geographic location. These is common in animals.
 
        
             
        
        
        
Answer:
Explanation:
A: Force is mass times acceleration, or F= m x a. This means an object with a larger mass needs a stronger force to be moved along at the same acceleration as an object with a small mass. This is Newton's Second Law of Motion
 
        
             
        
        
        
Answer:
food products and processing systems
Explanation:
It has nothing to do with Agriculture (plants)
It has to do with food
Nothing to do with power, structure, or technology
 
        
             
        
        
        
Answer:  change the shape of the active site of an enzyme
Explanation:
Enzymes are also sensitive to pH . Changing the pH of its surroundings will also change the shape of the active site of an enzyme. ... This contributes to the folding of the enzyme molecule, its shape, and the shape of the active site. Changing the pH will affect the charges on the amino acid molecules.
 
        
             
        
        
        
Answer:
The correct option is BLOOD CALCIUM LEVEL.
Explanation:
The options attached to this question are given below:
A.	Filtration membrane integrity
B.	Systemic blood pressure
C.	Blood calcium level
D.	Renal artery/arteriole diameters
Kidney is an excretory organ, which functions by filtering waste products out of the blood. The rate at which the kidneys filter the blood depend on some factors; such factors include: water intake, systemic blood pressure, vasoconstriction, dehydration, filtration membrane integrity etc. 
Blood calcium level does not have any effect on the rate at which the kidneys filter the blood.