The niche of an earthworm in an ecosystem is
a. a producer.
b. a consumer.
c. a detritivore.
d. a decomposer.
e. more than one of these.
C
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The __________ reactions convert _____ (B) to sugars
a. Calvin cycle; O2 b. light; CO2 c. Calvin cycle; CO2 d. light; O2
The sum of all gene copies at all gene loci in all individuals in a population defines a ____
a. ploidy level b. genome c. polymorphism d. gene pool e. genetic database
The segregation principle states that in sexually reproducing diploid organisms the two copies of each gene
a. move together as a unit during meiosis. b. separate from each other during mitosis. c. will both wind up in either the sperm or egg. d. must always be the same allele. e. segregate from each other during meiosis.
Which parasite is carried by Cyclops, an arthropod commonly found in still water?
A. Taenia saginata B. Schistosoma mansoni C. Dracunculus medinesis D. Fasciola hepatica E. Toxoplasma gondii