Species diversity is often very high in the region between two distinct communities, known as:
a. an ecotone.
b. a secondary successional area.
c. a primary successional area.
d. a fundamental niche.
e. a realized niche.
A
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Glycolysis, also called the ________ pathway, is a ________-step reaction sequence that converts glucose into ________.
Fill in the blank(s) with the appropriate word(s).
The ultimate evolutionary benefit to a male white-crowned sparrow's singing is to ____
a. attract a mate b. defend his territory c. advertise his availability as a sire d. intimidate rival males e. produce surviving offspring
The residence time is equal to the pool size divided by the flux between pools. The pool size of atmospheric carbon (carbon dioxide, methane, etc) is ~750 Pg, and the movement of carbon into the atmosphere from burning fossil fuels is around 7.5 Pg/year. How long does carbon from burning fossil fuels remain in the atmosphere on average?
A) 7.5 years B) 10 years C) 100 years D) 750 years E) There's not enough information to answer
The total number of named species is about
A) 160. B) 1.6 billion. C) 160,000. D) 1,600. E) 1.6 million.