00:01
For this problem, it looks like we are going to be answering questions from modules 19 and 20.
00:07
So start with module 19.
00:09
So question number 37 states that yellow fever and infectious disease transmitted to humans by mosquitoes killed more than 5 ,000 people out of a population of more than 30 ,000 in memphis, tennessee in the year 1878.
00:23
This population change is an example of density dependent regulation.
00:29
Number 38, when a forest fire destroys a habitat, but secondary succession regrows the forest, the new forest will continue to be modified over the years until equilibrium called the climax community is reached.
00:44
So that is option a.
00:47
Number 39 species biodiversity will decrease when a keystone species is removed from a population.
00:56
So number 39 is going to be option b.
01:02
Moving ahead to module 20.
01:05
Question number one states which of the following best describes an ecosystem.
01:10
And that is going to be a community of living organisms and their interactions with their abiotic environment.
01:17
So that is going to be option d.
01:20
Number two, the mass breeding and raising of livestock for human consumption has increased levels of carbon dioxide in the earth's atmosphere.
01:29
This is going to be true...