Colorado has a vast population of lodgepole pines. a population of lodgepole pines have been killed in a section of the forest. what is a possible limiting factor of that population? a. devastation by the pine bark beetle b. colorado’s long history of acidic soils c. genetic variability d. shallow root system

Answer;

A. Devastation by the pine bark beetle

Explanation;

If the presence or absence of a factor limits the growth of the ecosystems elements, it is called a limiting factor.

There are several abiotic factors that limit ecosystem growth, including temperature, precipitation, sunlight, soil configuration, and soil nutrients.  Some limiting factors depend on the size of the population. Other limiting factors affect all populations in similar ways, regardless of the population size.

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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