On the island of Daphne Major in the Galapagos, there are many different species of finches. In general, large ground finches with large, deep beaks would eat large, spiny seeds found on the ground. Small and medium sized finches with shorter beaks usually ate nuts, berries, and small tender seeds. In 1976 the island suffered an 18 month drought which forced the medium-sized ground
finches to compete with the large finches for the large, spiny seeds found on the ground. The graph below shows the distribution of beak depths of the finch population before the drought (white bars)
and after the drought (black bars).
Based on evidence from the graph, which of the following best explains how the population of the finches changed after the drought of 1976?
50
1976 Parents
40-
30
IL
1...
20-
10-
73
103
108 113
1883 88 93 9.8
A
Beak Depth (mm)

Read the following scenario to answer the following question. 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. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the

Climate like that in the sahara desert have the fastest rates of weathering