Filamentous microbial mats in anoxic, sulfide-rich cave springs are dominated by members of the ________.
A. alpha proteobacteria
B. delta proteobacteria
C. epsilon proteobacteria
D. beta proteobacteria
Answer: C
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Emergent properties are
a. characteristics of nonliving matter. b. exclusive to atoms but not molecules. c. neither exclusive to molecules nor compounds. d. characteristics that depend on the level of organization of matter but do not exist at lower levels of organization. e. exclusive to multicellular organisms.
An organism with an incompletely lined body cavity around the gut is termed a(n) ________ animal
a. coelomate b. acoelomate c. pseudocoelomate d. protostome
Methylation and RNA interference are both involved in regulating mobile genetic elements. Which of the following statements is TRUE?
A) Methylation is a form of post-transcriptional silencing, whereas RNA interference is a form of pre-transcriptional silencing. B) Both are examples of post-transcriptional silencing. C) Both are examples of pre-transcriptional silencing. D) RNA interference is a form of post-transcriptional silencing, whereas methylation is a form of pre-transcriptional silencing.
Which of the following is True concerning sexual selection?
A. Sexual selection always produces showy males. B. The results of sexual selection always increase the risk of predation. C. Hermaphroditic species use sexual selection to determine which sex to be during reproduction. D. Sexual dimorphism can indicate sexual selection.