The substance O2 is considered to be

a. both a molecule and a compound.
b. a compound but not a molecule.
c. neither a molecule nor a compound.
d. a molecule but not a compound.
e. a chemical but not a biological molecule.


D

Biology & Microbiology

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A cross is performed between parents with genotypes aaBbCc and aaBbcc. What is the probability that the offspring

will have the same genotype as the first parent? Assume that capital letters indicate dominant alleles and lower case letters indicate recessive alleles.

a. 1/8 b. 1/4 c. 3/8 d. 3/16 e. 9/16

Biology & Microbiology

Photosynthesis produces carbon dioxide and oxygen.

a. true b. false

Biology & Microbiology

As an overall average, about ______ of the energy at one trophic level is generally available to the next highest rank in the food chain.

A. two percent B. ten percent C. four percent D. seven percent E. twenty percent

Biology & Microbiology

Which of the following is NOT a mechanism of genetic change in populations?

a) genetic drift b) mutation c) natural selection d) biogeography e) migration

Biology & Microbiology