As glaciers in North America melted, formerly glaciated areas were invaded by

A) ice.
B) tundralike vegetation.
C) boreal forest, dominated by spruce and jack pine.
D) various species of trees, including spruce, white pine, oaks, and maples.


D

Biology & Microbiology

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In the correct order from smallest to largest, list the levels of organization present in most animals.

What will be an ideal response?

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Deserts caused by global patterns of air

circulation are dry because

a. as the moist air above deserts rise, all of the water evaporates b. dry, descending air above deserts draws moisture from the soil c. the moist air above deserts is absorbed by the sandy desert soils d. because of the warm temperatures, all the moisture in the deserts is drawn away and is transported by air currents to the tropics e. all of the air currents above deserts have no contact with bodies of water

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Homeostasis provides what kind of environment?

a. positive b. constant c. limiting d. changing e. chemical and physical

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You find a moldy orange in your produce bin in your kitchen cupboard. What characteristics of this environment

(consider both the orange and your kitchen) contributed to the growth of this mold? Why could a plant not have grown in this cupboard? What will be an ideal response?

Biology & Microbiology