Brown algae can reach up to ____ meters in length
a. 25
b. 50
c. 75
d. 100
e. 200
D
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What is production efficiency?
A. The rate of photosynthetic fixation as a function of temperature. B. The percentage of energy assimilated by an organism that becomes new biomass. C. The amount of energy used by organisms at every node of a food web. D. Consumption of primary production by the second and third levels of a food web. E. The net gain to an ecosystem based on photosynthetic production.
All of these statements are true of the IgG antibody class except __________.
A) it is the most abundant antibody class in body secretions B) it is the major antibody class in serum C) it readily crosses the walls of blood vessels and enters tissue fluids D) it can trigger the complement cascade E) maternal IgG antibodies can cross the placenta and confer passive immunity to a fetus
Ribosomes are complex aggregates of
A. RNA and DNA. B. RNA and sugars. C. DNA and proteins. D. nucleosomes and RNA. E. RNA and proteins.
Polypeptides and proteins are produced during the process of
A. replication B. transcription C. mutation D. translation