Thaumarchaeota is ubiquitous in
a. the soil.
b. the marine water column.
c. both the soil and the marine water column.
d. freshwater.
Answer: C
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Many bacteria that were originally classified in the genus Streptococcus are now placed into two new genera, Enterococcus and Lactococcus.
Answer the following statement true (T) or false (F)
Which is a disadvantage of an exoskeleton?
a. It must be shed (and a new one made) for its owner to grow. b. It does not provide as efficient a muscle anchorage as an endoskeleton. c. It allows for excess water loss. d. It is not flexible enough to allow a full range of movement. e. It is not able to absorb pigments for sufficient camouflage.
Approximately how many genes do humans
have?
a. 10,000 b. 20,000 c. 50,000 d. 100,000 e. 1,000,000
Which of the following statements about DNA replication is INCORRECT?
A. It begins at multiple origins of replication sites along eukaryotic chromosomes. B. Each strand within the DNA double helix is used as a template for synthesis of a new strand. C. It requires that both strands of the double helix be separated from each other. D. It proceeds with the addition of new nucleotides to the 3? end of a growing DNA strand. E. It is powered by the hydrolysis of ATP.