B. Stability because it makes the most sense
        
             
        
        
        
Answer: B. They always have offspring identical to the parent plant.
 
        
             
        
        
        
Answer:
D
Explanation:
 The label d is generated as a product due to the breaking down of Phosphate compound. 
 
        
             
        
        
        
Answer:
b. di uses across a synaptic cleft from a neuron to a muscle cell.
Explanation:
A neurotransmitter is di uses across a synaptic cleft from a neuron to a muscle cell. Neurotransmitters are chemicals which enable neurotransmission.  In reaction to an impulse a motor neuron axon secretes a neurotransmitter and causes the muscle fiber to contract. It is a chemical messenger which passes on the signals across the chemical synapse.
 
        
             
        
        
        
Endocrine and circulatory (C) Endocrine system consists of glands and the hormones they secrete whist the circulatory system is the blood or as I like to call the “transport system” of the body.