Answer:
coordinates the body's functions to maintain homeostasis during rest and exercise also to initiate and control movement, and all the physiological processes movement involves!
 
        
             
        
        
        
A dwarf is a recessive trait. In order for the plant to be shorter, it would have to have 2 recessive alleles. The plant is also purebread so it wont contain the tall allele. The gametes that are possible are tt.
        
             
        
        
        
I think if the whale population decreased the surface fish populations would decline due to reduced populations of algae. This can be simply explained by the fact that, if the whale population is decreased, it means that the nitrogen rich feces that is supply nutrients to the algae would also decrease and therefore decrease the population of the algae and as a result the population of  of the surface fish  would also decline. 
        
             
        
        
        
Answer:
Option-4
Explanation:
In the given question, S. alterniflora grows in the seaward marsh whereas  S. patensis grows in the high marsh. When  S. alterniflora is removed, the S. patensis grows to a smaller portion whereas if S. patensis is removed, the  S. alterniflora covers all the land.
This shows that although both are different species but they share a niche and the marsh land is the fundamental niche of the  S. alterniflora as it can grow in all parts and therefore its distribution is limited by only a realised niche.
Thus, Option-4 is correct.