Anaerobic bacteria often play important roles in bioremediation. Which of the following is NOT an electron acceptor used by anaerobes during biodegradation reactions?
A) H2O
B) CO2
C) SO4-2
D) NO3-
E) Fe(III)
A
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A small island has stable populations of plants and animals, including one species of hawk but no other large predators. A ship docks at the island, and the ship's cat escapes. If the cat was pregnant, what do you think the sailors are likely to find if they return ten years later?
A. The island will have similar flora and fauna, with the addition of a cat population. B. The increase in nitrogenous waste from the cats will increase plant productivity. C. The bird and lizard species on the island will have many new adaptations. D. Some species of ground-nesting birds may have gone extinct. E. Species that were formerly preyed upon by hawks will benefit.
What is the pH of a solution with a hydroxyl ion (OH-) concentration of 10-12 M?
A) pH 2 B) pH 4 C) pH 10 D) pH 12 E) pH 14
The ability of cells to control their level of gene expression is called
A. gene transformation. B. gene regulation. C. gene splicing. D. gene addition. E. gene correction.
A cross is performed between parents with genotypes aaBbCc and aaBbcc. What is the probability that the offspring
will have the same genotype as the first parent? Assume that capital letters indicate dominant alleles and lower case letters indicate recessive alleles.
a. 1/8 b. 1/4 c. 3/8 d. 3/16 e. 9/16