The four most common elements in living organisms are
A) C, H, O, Fe.
B) C, H, O, Na.
C) C, H, O, N.
D) C, N, O, Na.
Answer: C
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Drugs that target prokaryotic protein synthesis would have no effect on eukaryotic protein synthesis
Indicate whether this statement is true or false.
The antibiotic streptomycin prevents protein synthesis in prokaryotes. Which cell component would be affected by this antibiotic?
A) ribosome B) cell membrane C) Golgi apparatus D) cell wall
What is the ultimate source of energy for almost all living organisms?:
a. heat b. lipids c. the sun d. glucose e. carbon dioxide
Keystone species
a) occur only in intertidal zones b) can be removed from a habitat without any impact on the remaining species in the habitat c) play an unusually important role in determining the species composition in a habitat d) are primary produces, and therefore, are usually plants e) are more expendable than commensal species, from a conservation perspective