PEER Life Science Ecosystems Environmental Protection

Cows grazing in a pasture with a creek and rich soil is an example of a(n)_____

• extinction

• ecosystem

• epidemic

• herbicide

All of a populations's genetic material at a given time is a(n) _____

• allele

• selective breeding

• species

• gene pool

A resource that has a supply which can be maintained at a certain level is _____

• sustainable

• nonrenewable

• organic

• selectively bred

A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding is a(n) _____

• population

• gene pool

• species

• ecosystem

A substance used to kill, repel, or control organisms harmful to cultivated plants or to animals (pests) is a(n) ______

• pesticide

• protozoan

• parasite

• epidemic