Evolution Review

Which population would natural selection work on?

• a population of birds with the same

• a population of cacti with the same height

• lizards with different skin patterns

What is radiometric dating?

• to find the relative age of rocks around fossils

• to find the exact age of rocks around fossils

• can't be used on rocks or fossils

Which evidence suggests that evolution has occured

• animals get skinny

• new animals move into an rea

• trait frequency in a population changes

Fossils tell us that...

• information about organisms that live in the past

• there are no similarities between animals in past and present

• earth has not changed

Embryology suggests similar past ancestors because

• developing embryos never look simillair

• developing embryos look similar at some point in development

• the embryos look exactly the same through out

In this type of selection, genetic diversity decreases as the population stabilizes on a particular trait value. The graph moves up in the middle.

• stabilizing

• directional

• disruptive

Which is a population?

• all the whitetail deer in the world

• all the whitetail deer that live on a large farm

• all of the pine trees in the world

• all of the animals that live in the artic

In a population of unicorns there is large horns (L) and small horns (l). The small horns get eaten by predators more often. What will happen to the allele frequency?

• l allele will increase

• L allele will decrease

• nothing

• l allele will decrease

A lizards front leg, a birds wing, and and a front alligators wing are homologous structures suggesting what?

• a possible common ancestor

• that birds evolved into land reptiles

• these are all vestigial stuctures

In this type of selction, individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other. The center of graph shifts to the left or right

• directional

• contrastive

• destructive