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.


__X__  Probability of extinction varies inversely with population size.
__X__  Ten 10-hectare habitat patches is not the same as one 100-hectare patch.
__X__  Habitat loss is currently the major cause of extinction.
_____  The prehistoric megafauna of North America were spared from extinction because they coevolved with humans.
__X__  Probability of extinction is greatest for an endemic species.

Biology & Microbiology

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Answer the following statement true (T) or false (F)

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Which of the following is composed of a 1:2:1 ratio of carbon to hydrogen to oxygen?

a. carbohydrate b. protein c. lipid d. nucleic acid e. steroid

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Which type of mutation is possible thanks to the redundant nature of the genetic code?

A) silent B) missense C) nonsense D) frameshift E) splice site

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Which type of roots are also known as prop roots?

A. Adventitious roots B. Aerating roots C. Aerial roots D. Contractile roots E. Coarse roots

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