Which of the following mutations would likely be most dangerous to a cell?
A. Deletion of one nucleotide
B. Substitution of one nucleotide for another
C. Deletion of three nucleotides
Ans: A. Deletion of one nucleotide
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Which of the following is an example of the
Red Queen hypothesis?
a. spiders evolve resistance to a viral disease; the virus becomes more virulent b. dogs evolve characteristics that are selected by humans c. dinosaurs lack the adaptations to survive predation of their eggs by small mammals d. horses evolve from a five toed animal to one toe e. cats and cows separately, but for similar purposes, evolve scratchy tongues
Some evidence that algae are the closest relatives to plants is that they both
A. have chloroplasts. B. contain chlorophyll a. C. have cellulose-rich cell walls. D. use starch as a nutrient reserve. E. All of the answer choices are correct.
A gene that produces multiple effects is called
a. co-dominant gene. b. an X-linked gene. c. an epistatic gene. d. a pleiotropic gene. e. an incompletely dominant gene
An organism that is eukaryotic is by definition:a
is a protist b. is unicellular c. possesses a nucleus d. possesses organ systems e. belongs to domain Bacteria