What are two types of deserts?
a. cold tundra and sandy beaches
b. cold tundra and plateaus
c. dry deserts and cold tundra
d. dry deserts and plateaus

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Which of the following is true about the introduction of a non-native species to an environment? (a) they usually adapt quickly so they can have a positive affect on the environment. (b) they can disrupt the environment and cause much damage and devastation to native species. (c) they usually become predators in a food chain and to keep prey populations under control. (d) because the native species are better-adapted to the environment, the non-native species always end up dying out.

How could global warming impact agriculture?