Ethanol can be easily produced from ____
a. photosynthetic pigments
b. crystalline cellulose
c. root systems of plants
d. plant sugars
e. stems of plants
ANSWER: d
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Which of the following statements about the causes of extinction are true? Check all that apply.
_____ Probability of extinction varies inversely with population size. _____ Ten 10-hectare habitat patches is not the same as one 100-hectare patch. _____ Habitat loss is currently the major cause of extinction. _____ The prehistoric megafauna of North America were spared from extinction because they coevolved with humans. _____ Probability of extinction is greatest for an endemic species.
The microorganism Cryptosporidium parvum is a
A) fungus. B) bacterium. C) protozoan. D) virus.
Who observed that species of organisms on different islands were clearly similar, yet had distinct differences?
What will be an ideal response?
Diffusion moves items with their concentration gradient
a. true b. false