The number of chromosomes in diploid eukaryotic cells
A. is 46.
B. changes as each organism grows and ages.
C. can be predicted by the size of the organism.
D. varies considerably from 2 to over 1000 in different species.
Answer: D
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Which of the following statements is true regarding histamine? Select all correct choices
A. It can be produced by granulocytes. B. It indirectly causes swelling. C. It contributes to inflammation. D. It causes blood vessels to expand. E. It changes the permeability of blood vessels.
Chemicals in tobacco smoke can cause _____
a. DNA to break into pieces. b. mispairing of bases. c. kinking in the DNA molecule. d. the formation of nucleotide dimers. e. covalent bonding between adjacent adenine bases.
All of the following are reasons for utilizing algae for biofuel production EXCEPT
A) they do not take up land needed for food production. B) they produce more energy per acre than corn. C) their main requirement is abundant light. D) they can utilize agriculturally poor land. E) they produce a nondegradable waste product.
Most cellular work is accomplished by _____ energizing molecules by _____ them.
Fill in the blank(s) with the appropriate word(s).