. Define the terms species, population, and community. How does a species differ from a population? How does a population differ from a community?

As we saw last week, population size is important. Ideally, this means you started with a lot of genetically diverse founders, but of course that isn’t always the case. In the case of the Española Galapagos tortoises it was 12 females and 2 males. So, often you have to grow your population to stabilize it and ensure there isn’t an unacceptable loss of genetic diversity over time, even if that genetic diversity is low. If you think back to the math from last week and do a little not so fancy algebra, you can see that genetic deterioration occurs at a rate that is the inverse of genetic retention, which you probably remember is  1- (1/2Ne) Assume that the Española Galapagos tortoise captive population started with an Ne/N ratio of 0.7. Calculate their rate of loss of genetic diversity given their original population size of 14 tortoises (N=14). You will first need to solve for Ne, then plug Ne into the rate of loss of genetic diversity formula. Now let’s work on growing the population.…

Decide which examples are most likely to increase variation or decrease variation. Some examples could do both. Which of the following could possibly increase genetic variation indirectly? toxins predator-prey relationships competition new habitat disasters increased food supply

Use the graphs to answer the question below. In eách of the figures, the x-axis represents time, and the y-axis represents population size. The solid line is population size of Species 1; the dashed line is population size of Species 2. ic is В. С. D. Which one of the graphs above illustrates competitive exclusion? O Graph A O Graph B O Graph C Graph D

Contrast density-dependent versus density-independent population processes.

You arrive on an alien planet and settle down to live there for a long time.  There are very few species.  Two of the species (A and B) are sometimes common and sometimes rare.  When you start keeping track of population changes you discover that the population sizes fluctuate on a regular cycle in close synchrony.  Species B always increases first, followed by species A. Which of the following would be the best explanation for what you are seeing? Group of answer choices -Species A is a predator and there is a time lag between changes in the density of its prey and species A's population change -Species A is a predator and it can respond instantly to changes in its prey population -Species B is a predator and there is a time lag between changes in the density of its prey and species B's population change -Species B is a predator and it can respond instantly to changes in its prey population

Please solve

Environmental factors can influence the survival rate of the organism in a population. Name at least 5 environmental factors.

Based on the images provided, the distribution of animals seen is dependent on which one of the following?  Explain your choice. species population size community ecology spatial scale immigration and emigration