__________, or four-legged walkers, evolved from
lobe-finned bony fishes. Fill in the blank(s) with the appropriate word(s).
Answer: Tetrapods
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Genetic drift can eliminate alleles from a population more quickly than natural selection
Indicate whether the statement is true or false.
If the DNA nucleotides read ATG-CGT-GAC, the
amino acid sequence of the resulting polypeptide would be a. tyrosine – alanine – leucine. b. methionine – arginine – asparagines. c. histidine – glycine – praline. d. serine – lysine – glycine. e. all of these.
Generally, animals cannot digest (hydrolyze) the glycosidic linkages between the glucose molecules in cellulose. How then do cows get enough nutrients from eating grass?
A. They have to eat a lot of it. B. Microorganisms in their digestive tracts hydrolyze the cellulose to individual glucose units. C. Cows and other herbivores are exceptions and make some cellulose-digesting enzymes. D. The flat teeth and strong stomach of herbivores break the cellulose fibers so that the cows get enough nutrition from the cell contents. E. All of the above.
Which of the following is a source of electrons that plants use for reduction reactions during photosynthesis?
A) CO2 B) RuBP C) O2 D) H2O E) Glucose