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2 years ago

If there is no immigration or emigration, how do the birth rate and the death rate affect population size?

Biology

1 answer:

Andrej [43]2 years ago

3 0

Answer:

When the birth rate and the death rate remain the same, the population size does not change.

When the death rate exceeds the birth rate, the population shrinks.

Explanation:

essentially, the scenario is saying if the population stays the same (as in, the only things that change the population are death rate and birth rate changing)

these two concept's effects are inverse--the effect of death going up is the same effect as birth going down

so, if the death rate (- population) exceeds birthrate (+ population),

[-] > [+]

the population will logically shrink

when the birth rate (+ population) and the death rate (- population) are the same,

[+] = [-]

the population will logically stay the same

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