Urban heat islands can cause an increase in pollution, which is very harmful to people’s health.
a. heat
b. ozone
c. runoff
d. water

Plants in the tundra biomes have had to adapt to live long periods of time without a. cool temperatures b. sunlight c. oxygen d. water

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.