It is particularly important for plants to obtain nitrogen from ________.
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_______ diversity is the raw material that generates adaptation in species.
To date, ________ of eukaryotic species have been identified and named.
|a.||less than 20 percent|
|b.||more than 75 percent|
Lakes and ponds are heavily influenced by ________.
Precipitation is an important factor influencing the ________.
|a.||distribution of biomes|
|b.||biodiversity of ecosystems|
|c.||distribution of populations|
Tropical rainforests have ________
|a.||distinct seasonal changes in temperature and precipitation|
|b.||the most stable temperature and precipitation profile year round|
|c.||seasonal fluctuations in rainfall from summer and winter|
What is an endemic species?
|a.||a species that is very rare and difficult to find|
|b.||a species that is native to a specific area, usually one with restricted geographical size|
|c.||species that were once a single species, but divided over the years due to geographical separation|
Cold water has more dissolved ________.
Island ________ attempts to explain why certain isolated island chains are particularly species rich.
Animals with aposematic coloration use color patterns to ________.
|a.||warn off predators|
|b.||mimic a more dangerous organism|
|c.||blend in with their environment|
In a ________ relationship, one organism is harmed but rarely killed.
What is fecundity?
|a.||an organism reproduces once in its life then dies|
|b.||the potential reproductive capacity of an individual|
|c.||the life history of an organism|
In general, ________ organisms are more densely distributed compared to ________ organisms.
|b.||more complex; less complex|