Environmental Science Final Exam Spring 2021
1.
Which of the following would be a density-independent cause of large numbers of deaths in a
population?
a. Disease-carrying beetles
b. Food shortages
C. Hurricanes
d. Predatory birds
2. How many species of organisms exist on Farth?

the answer is d. chordata

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.