In horsetails, lycophytes, and whisk ferns,
a. spores give rise to gametophytes.
b. the main plant body is a gametophyte.
c. the sporophyte bears sperm- and egg-producing
organs.
d. the gametophyte is the dominant stage in the life
cycle.
e. all of these are true.
Answer: a
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Ctenophores feed on:
a. phytoplankton. b. benthic algae. c. planktonic animals. d. detritus. e. DOM.
DNA replication occurs during cytokinesis. Indicate whether the statement is true or false
Red-green color blindness is an X-linked trait. In a population genetics study, 1,000 people (500 men and 500 women) were tested for this trait, and 35 men were found to be color blind
Use this information to compute the frequency of the allele for color blindness and the wild-type allele in this population, and estimate the expected number of carrier females.