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The figure indicates that ________.

In the food chain grass → antelope → human → lion, the antelope is ________.

Islands provide great evidence for speciation because:

Read the following scenario to answer the following questions.Over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems, including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction.Some biologists urge the collection of the few remaining individuals of some of the most threatened amphibian species in order to preserve them if they become extinct in the wild. If such captive-breeding programs could produce thousands of individuals from just a few of the remaining survivors, the species will still be threatened because of ________.

________ is the discipline of biology that focuses on classifying organisms and determining their evolutionary relationships.

Fossils:

Which biome receives large amounts of rainfall (that determines the type of vegetation that grows) and is warm year-round?

The origin of the genus Homo and speciation of mammals, birds and pollinating insects occurred during:

In an aquatic food chain, small fishes that eat zooplankton are ________.

Read the following scenario to answer the questions that follow.Drs. Peter and Rosemary Grant have been conducting observational research studies on finch species on Galápagos Island Daphne Major for over 40 years. The medium ground finch has a relatively small beak and a diet that consists primarily of small seeds. Large-beaked finches are able to eat larger seeds in addition to small ones. These two species successfully co-existed on the island for over 20 years, but two years of severe drought in 2003 and 2004 lead to intense competition between them because food supplies were destroyed in the drought. Numerous birds in both populations died from starvation. Interestingly, the Grants noticed that the smaller-beaked finches did not face the same degree of competitive pressure, because they could more easily eat the smaller seeds that were not being eaten by the larger finches. Only a short time later (2004-2005), the Grants observed that new populations of finches had more birds with smaller beaks than larger ones. As well, finches tended to seek out larger seeds half as often as in preceding years. The Grants’ data suggest that ________.