Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____ 1. Water is lost to the abiotic parts of the biosphere from the biotic parts by the process of _____.
a. precipitation b. photosynthesis c. transpiration d. infiltration
____ 2. Nitrogen is released to the abiotic parts of the biosphere from the processes of death and _____.
a. decay by bacteria b. infiltration of groundwater c. runoff d. lightning in storm clouds
____ 3. Some birds are known as honey guides because they may be followed by humans to wild beehives. When the humans take honey from the hives, the birds are able to feast on the honey and bees, too. This type of relationship can best be described as _____.
a. parasitism b. commensalism c. mutualism d. symbiosis
____ 4. Starfish live in saltwater ecosystems. Some species live in shallow tidal pools, while others live in the deepest parts of the oceans. This is a description of the _____ of starfish.
a. habitat b. community c. niche d. none of these
____ 5. Cougars are predators that often eat weakened or diseased animals. This is a description of the _____ of cougars.
a. habitat b. community c. niche d. none of these
____ 6. An ecologist who studies how several species in an area interact among each other and with the abiotic parts of the environment is interested in the biological organization level called a(n) _____.
a. organism b. population c. community d. ecosystem
____ 7. An ecologist who studies how several species in an area interact is interested in the biological organization called a(n) _____.
a. organism b. population c. community d. ecosystem
Figure 2-1
____ 8. Referring to Figure 2-1, suppose 10 000 units of energy are available at the level of the grasses. What is the total number of energy units lost by the time energy reaches the coyote?
a. 90 units b. 990