Module 7 Review: Populations

When looking at rock layers, fossils are typically _____ at the bottom and _____ at the top.

• oldest, youngest

• youngest, oldest

• broken, complete

• complete, broken

___ seeks to determine the age of a fossil using radioactive isotopes.

• absolute dating

• relative dating

• zoology

• archaic dating

Having similar _____ is a strong indicator that organisms share a common ancestor.

• DNA

• cell membranes

• cell walls

• structures for movement

Identifying DNA sequences through _____ has helped to identify and better understand similarities in DNA sequences across species.

• comparative genomics

• comparative anatomy

• geology

• paleontology

In terms of evolution, or change, it is the ____ that changes not the ____.

• population, individual

• individual, population

• ecosystem, community

• individual, community

The genetic shuffling that takes place during _____ and sexual reproduction introduces new gene combinations within a population.

• meiosis

• mitosis

• budding

• binary fission

A _____ is a group of interbreeding organisms (one species) that lives in the same place at the same time and competes with each other for food, water, shelter, and mates.

• population

• community

• ecosystem

• biome

The accumulation of mutations within a population over time can result in changes to the _____.

• gene pool

• offspring

• individual

• organism

The process of increasing the frequency of beneficial alleles in the population while decreasing the frequency of deleterious alleles is called _____.

• survival of the fittest

• geographic isolation

• adaptive evolution

• population genetics

Sometimes, structures exists in organisms with no explained function. Scientists view these structures as left over (residual) parts from a past ancestor. The unused structures are called _____ structures.

• vestigial

• pseudo

• homologous

• variant