Question

PLEASE HELP ASAP

The graph shows data from a decades-long study of cliff swallows, which nest along highway overpasses. The solid line represents the population of living cliff swallows; the dotted line represents that of cliff swallows found as roadkill.

Which conclusion is BEST supported by the data shown?
A) Differences in wing length are leading to speciation within the population.
B) Individuals with longer wings are out-competing individuals with shorter wings.
C) Alleles for shorter wings increase fitness, causing a change in the population’s gene pool.
D) Deaths due to vehicular traffic are increasing, causing the cliff swallow population to decline.

Answer 1

it is c 100%

Step-by-step explanation:

Answer 2

C

Explanation: C, because the graph shows that, beginning in the 1980s, the wingspans of living cliff swallows has decreased. Over the same period, the wingspans of cliff swallows found as roadkill has increased. This indicates that natural selection is acting against the phenotype of longer wingspans, resulting in a population with shorter average wingspan. In other words, alleles for shorter wings increase fitness, causing a change in the population’s gene pool.