If there were no decomposers, which of the following would most likely happen
a. some plants might die due to a shortage of important nutrients
b. plants and animals would remain living for a longer period of time
c. animals would start carrying out photosynthesis
d. the amount of dead plant and animal matter would decrease

Some plants might die due to a shortage of important nutrients.

Explanation:

Decomposers are important because when they break down dead matter, they restore essential nutrients to the ecosystem which are used by plants to make food. Nitrogen, magnesium, and phosphorus are examples of nutrients that are released by decomposers. Without decomposers, many plants would likely die due to a shortage of these nutrients. Also, decomposers keep dead matter from "piling up" in the ecosystem.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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