Vernon is studying the population of deer in a tract of forest. He gathers the following data.
Birth rate: -50 deerlyear
Death rate: -70 deerlyear
Which additional observation would support the conclusion that the deer population is NOT changing size from year to year, meaning that the
net population change is 0?
A
About 20 deer per year immigrate to the tract of forest.
B. About 20 deer per year emigrate from the tract of forest.
C. The average life span of a member of the deer population is 20 years.
D. If a deer survives its first year of life, its average life span is 20 years.

this is a good question! i'll do some research and come back when i have the answer!

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.

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