The one going to the terminal continues, the other is stopped. The one heading towards the spike initiation zone continues, the other is stopped. D. Both are stopped. E. Transmitter is released at the point where they meet. This question is only worth 5 points.
Adaptation is the key to successful existence.
Clams succeed because they can keep their shells closed shut for very long periods of time by a sustained contraction of the adductor muscle. Interestingly, the maintenance of the contracted state occurs without ATP utilization although ATP is used to initiate muscle contraction. Using your knowledge of muscle contraction, speculate on how clams can maintain adductor contraction without ATP hydrolysis. Any answer that invokes an ATP-independent mechanism to move actin across myosin is acceptable. Some flowering plants have four different genes, A, B, C, and D, that cause floral differentiation in floral meristems.