Which of the following is a plant waste product?
A. oxygen 
<u>B. carbon dioxide </u>
C. water 
D. sugar
 
        
             
        
        
        
Answer: Closed
Explanation:
At  resting membrane potential( RMP) sodium channels remained shut, this is because , previously  in depolarisation,the  voltage  gated sodium  channels  were opened for sodium to diffuse  into the Axon. However   these channels closed  after reaching their refractory period,s.
Therefore a  change  in the extracellular concentration of sodium will not  open them 
 
        
             
        
        
        
The system of lenses close to the slide is known as the objective and the one on top of the microscope is known as the eyepiece. Answer is eyepiece.
        
             
        
        
        
Sexual reproduction leads to genetic variation because the sperm and egg that are produced contain different combination of genes than the parent organisms. sexual reproduction involves meiosis which is in the process of a cell doubling its DNA.