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)

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.