<span>The sum total of all the chemical reactions that occur in organisms is called-</span>Metabolism
        
             
        
        
        
Answer: B. Temperature of 35 degrees celsius
Explanation: It is highest at the point between 30 and 40, which is where it's activity is the strongest.
 
        
             
        
        
        
Answer:
Gabriel's horn
Explanation:
What the question is asking for is a 3-dimensional shape that has a lot of surface area and only a little volume. The first thing I thought of was a geometric figure called Gabriel's Horn. A quick search on Wikipedia will explain better than I can, but basically it has infinite surface area but finite volume. You probably couldn't test the shape in any experiment, though, since it's only theoretical and can't exist in real life.
Let me know if I can explain anything in a clearer way! 
 
        
             
        
        
        
<span>Transmitted via neurotransmitters. There is a gap between two neurons. This place where the axon meets with dendrite is callde synapse. Neurotransmitters which are chemicals help transmit the signals from axon to dentrite. Calcium ions play major role in this process.</span>