Which compound plays a pivotal role in both the first and last step of the TCA cycle?
a. oxalate
b. oxaloacetate
c. glycerol
d. acetyl CoA
e. pyruvate
Answer: b. oxaloacetate
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Virus replication only occurs
a. when conditions stress the virus. b. at regular intervals. c. inside a host cell. d. outside of eukaryote cells. e. when virus particles undergo binary fission.
Daily humidity levels in the tropical wet forest are so high that some plants have evolved that grow on other plants, gathering their water from the rainfall and the air around them. What are these plants called?
a. saprophytes b. caprophytes c. epiphytes d. neophytes
Scientists have determined that the silversword alliance is most closely related to the tarweed based on
a. phylogenetic similarities. b. molecular comparisons. c. the ability of the two plants to interbreed. d. their geographical closeness. e. seed shape and color.
Which of the following is a true statement?
A. A cross between Bb and bb genotypes would lead to offspring with a 1:4 phenotypic ratio. B. An example of a homozygous individual is Bb. C. You may associate pedigrees with purebred animals, such as purebred dogs, but pedigrees cannot represent human matings. D. A testcross is a mating between an individual with a dominant phenotype (but unknown genotype) and a homozygous recessive individual.