Unit Three Review Population and Biodiversity

Which of the following organisms has the highest reproductive potential?

• Bacteria

• Dogs

• Elephants

• Humans

Predators kill their prey

• Usually

• Always

• Never

• Try not to

Bacteria in your intestines are examples of mutualism if they

• Make you sick

• Are destroyed

• Have no effect on you

• Help to break down food

Which of the following is an example of a parasite?

• worm in your intestine

• a lion hunting a zebra

• Bee stinger in your arm

• Honeybee on a flower

What do we know about the number of individual species currently living on Earth?

• There are no new species being found

• All the species that exist on Earth have been cataloged

• About 1.7 million species are known to exist

• There are more trees and mammals than there are insects

A mass extinction is

• a rapid increase in biodiversity

• the introduction of exotic species

• the extinction of many species in a short period of time

• a benefit to the environment

Some species are so important to the functioning of an ecosystem that they are called

• threatened species

• keystone species

• endangered species

• extinct species

An example of a population would be all

• Trees in a forest

• Plants in a forest

• Red Maple trees in a forest

• Animals in a forest

Each of the following is an example of a parasite except

• A roundworm in a human's intestine

• A tick in a cat

• A cow in pasture

• Mistletoe on a tree

Between 1880 and 1930 human population doubled due to

• The Industrial Revolution

• Combination of high birth rates & low death rates

• Improvements in social infrastructure & services

• All of the Above