Answer:
this doesnt make sense please look over your question and correct the wording
12. they weight about 45 pounds or more
13 am not sure sorry
B is brown eyes. b is blue eyes. Hope this helps !!
Tolerance range refers to the range of conditions of the external environment an organism is able to withstand. The population size of a certain species can be lowered if conditions are outside optimum range. The population is lowered because the organisms cannot survive if there is too much or too little of a factor.
Answer:
The process is referred to as Synaptic impulse.
Explanation:
It is a kind of chemical synapse that is generated by motor neuron and muscle fiber.The motor neuron transmit signals to the muscle fibers that causing muscular contraction.This process takes place in neuromuscular junction.
Steps include-
- Nerve action potential
- calcium entry into the presynaptic terminus
- Acetylcholine releases .
- Diffusion of Ach takes place across the synaptic cleft.
- Ach combines with post synaptic receptors and Ach is broken down.
- Na+/K+ Channel opens.
- Post synaptic depolarization takes place.