20. In a biological community where diversity is great, such as a tropical rainforest, the abundance of any one species is likely to be A) large in number B) small in number C) widely variable from year to year D) the same from year to year

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Regarding Mount Improbable, what is the most likely force that could cause a population stuck on a lower peak to temporarily escape and go down a slope, enabling it to possibly rise to a higher peak later on? a) Genetic drift b) Migration c) Mutation d) Natural selection

Succession can be viewed as the effect of ____i____ competition on a community in which ____ii____ species tend to gradually be outcompeted by ____iii____ species. The row below that best completes the statement above is row a. interspecific; r-selected; K-selected b. interspecific; K-selected; r-selected c. intraspecific; r-selected; K-selected d. intraspecific; K-selected; r-selected

Based on the information above, which of these would most likely be affected by a global warming A) rattlesnakes in the desert B) polar bears living on the sea ice C) earthworms borrowing in the ground D) spider monkeys in the tropical rain forests

4)What effects does removing sea anemones from a coral reef ecosystem have on the types of fish species present? a)Population b)Community c)Ecosystem

40. Why is biodiversity important?   Increased biodiversity can lead to improved and functioning ecosystem services. All of the choices are true. A loss of biodiversity can be bad for humans, either directly or indirectly. Increased biodiversity can make a habitat more stable.

Based on island biogeography theory, how is diversity expected to vary among different islands?   a)Larger islands that are further from mainland will have relatively high diversity b)Smaller islands that are closer to mainland will have relatively high diversity c)Larger islands that are closer to mainland will have relatively high diversity d)Smaller islands that are further from mainland will have relatively high diversity

New Zealand snapper populations were found to be under the influence of genetic drift, suggesting overfishing was still an issue for them, despite the New Zealand fisheries estimating their total population size to be over 3 million. Which of the following is the best explanation for this observation?     A) Pelagic fish, like the New Zealand snapper, often only have a few reproductive individuals, therefore their effective population size is actually much smaller than the total population size.     B) Pelagic fish, like the New Zealand snapper, often have an equal sex ratio which affects the number of breeding individuals.     C) Pelagic fish, like the New Zealand snapper, often have disassortative mating which affects the number of breeding individuals.     D) Pelagic fish, like the New Zealand snapper, often have assortative mating which affects the number of breeding individuals.

Based on the intermediate disturbance hypothesis, a community's species diversity is increased bya) frequent immigrations of new speciesb) moderate levels of disturbancec) intensive disturbance by humansd) stable conditions with no disturbance