Chapter 18

A community consists of species _____ . a. that share a habitat b. that do not compete c. that share a gene pool d. with the same niche

Which of the following can be a symbiosis? a. Interspecific competition b. Predation c. Commensalism d. All of the above

Match the species interaction with a suitable description. mutualism competition predation parasitism herbivory a. A snake kills and eats a mouse. b. A bee pollinates a flower while sipping floral nectar. c. An owl and a wood duck both need a tree cavity to nest. d. A mosquito sucks your blood. e. A goat grazes on grass.

Parasitoids are ______ that lay eggs in their hosts. a. birds b. reptiles c. insects d. fish

The establishment of a biological community on a newly formed volcanic island is an example of _______. a. primary succession b. secondary succession c. competitive exclusion d. resource partitioning

Match the terms with suitable descriptions. producer brood parasite decomposer detritivore exotic species a. steals parental care b. feeds on small bits of organic matter c. degrades organic wastes and remains to inorganic forms d. captures sunlight energy e. new to a community

Match each substance with its largest environmental reservoir. One reservoir choice will be used more than once. carbon Water phosphorus nitrogen a. seawater b. rocks and sediments c. the atmosphere

Earth's largest reservoir of freshwater is ______. a. lakes b. soil water c. ice in glaciers and ice sheets d. water in the bodies of living organisms

Land plants take up the ______ they require for photosynthesis from the air. a. carbon dioxide b. phosphate ions c. ammonium ions d. nitrogen gas

Addition of ______ to water encourages algal blooms. a. carbon dioxide b. phosphate ions c. salt d. bicarbonate ions

A biological control agent is ______ a pest species. a. the prey of b. a descendant of c. mutualistic with d. a natural enemy of

Carbon dioxide _____. a. is a greenhouse gas b. is released by burning fossil fuels c. has increased in the atmosphere since 1800 d. all of the above

$$A(n)$$ ______ species is one that arrives early in succession. a. keystone b. pioneer c. commensal d. exotic