Which describes the number of people who die per one thousand individuals
in a population per year?

The correct answer is death rate.

Explanation:

Death rate is also called the mortality rate which is defined as the number of individuals in a population dying in a given period. It is also expressed as the number of people who die from a population having 1000 individuals in a year.

If the birth rate and the death rate of a population is equal then the population growth rate is zero. If the birth rate exceeds the death rate then its population growth rate is positive and when the death rate exceeds the birth rate then population growth is negative.

A negative population growth rate shows that the mortality rate is high due to which the number of individuals in the population is decreasing.

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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weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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