Chapter 10-BSC385

Natural Selection: Empirical Studies in the Wind

Why did birds get pushed to have evolution in beak size?

Severe drought that resulted in harder more woody seeds available.

What are the requirements needed for natural selection?

Heritability and selective force

What is Character displacement?

Competition driven divergence of the niches of two competing species.

What causes character displacement?

Lower fitness of a species with trait values that overlap with those of another species.

Where is the low-Eda allele present at?

In freshwater

Who has the greatest impact as an agent of selection?

Humans

How do humans represent themselves as agents of selection?

Artificial selection, chemical and bacterial resistance, habitat alteration, introduced species, hunting and fishing.