Which of these structures converts highly toxic ammonia into urea, a less toxic form of nitrogenous waste?
A) Muscles B) Liver C) Spleen D) Pancreas E) Kidney
B
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Each DNA parent strand within a replication bubble acts as a template strand that produces:
A. either a leading strand or a lagging strand. B. two leading strands or two lagging strands. C. one leading strand and one lagging strand. D. only leading strands. E. only lagging strands.
An arrowworm is a type of planktonic
a. herbivore. b. detritivore. c. carnivore. d. omnivore. e. filter feeder.
A three-base sequence, found on the bottom loop of tRNA, that is complementary to a sequence of three bases in mRNA is a(n)
A. terminator. B. amino acid attachment site. C. promoter. D. codon. E. anticodon.
How many different offspring genotypes are expected in a trihybrid cross between parents heterozygous for all three traits when the traits behave in a dominant and recessive pattern? How many phenotypes?
A. 64 genotypes; 16 phenotypes B. 16 genotypes; 64 phenotypes C. 8 genotypes; 27 phenotypes D. 27 genotypes; 8 phenotypes