Answer:
a. allow a variety of molecules to cross the cytoplasmic membrane 
Explanation:
The cells have different molecules in its membrane. As a membrane the main function of it is to regulate the income and outcome of substances that the cell needs or the cell has like some wastes. 
Some of these molecules can be some proteins like the permeases, that is going to  regulate the solutes that can enter the cell, but since they are non specific, that means that can not make the difference among one carbohydrate and another (as an example).
 
        
             
        
        
        
I think the hormone would be testosterone, it would be subjectively deemed useless in times other than procreation. I would suggest that the important hormone is the growth hormone Thank you for your question.
 
        
                    
             
        
        
        
The answer is plankton are floaters. Plankton and nekton are both marine aquatic organisms. The main difference between the two is that plankton tend to float and be carried by water currents while nekton are organisms that swim against the current of the water. Plankton are passive swimmers while neekton are active swimmers.
        
                    
             
        
        
        
Answer:
A?
Explanation:
i don't really know im just guessing... also i agree with them needing a science option
Ω Entity001 And Project Omega Ω
also i have two questions of my own... they are listed above this comment in this answer, they are brainly questions so you have no reason to flag and delete this or anything in those questions... and if you do ill be very mad and you don't wont me on your bad side believe me... im saying i have very bad anger issues that CAN become violent but i don't really want to get that way so please... no flagging and deleting anything unless its an out of site link.
questions i had:
brainly.com/question/22627627
brainly.com/question/22627912
i will have another one but i need the five points to make the question so ill tell yall in a comment in this answer
 
        
                    
             
        
        
        
The glacial budget refers to the input of water to the output of water. The input is when people put water in the glacier and the output is when the glacier starts to evaporate.