Which bacterial organism has a complex life cycle that involves gliding motility, swarming, and aggregation to form fruiting bodies coordinated by quorum sensing, followed by differentiation into spores?
a. myxobacteria
b. Treponema
c. mixotrophs
d. Leptothrix
Answer: A
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Which one of the following is NOT one of the general classes of macromolecules that are necessary for cellular function?
A. Nucleic acids B. Proteins C. Ions D. Carbohydrates E. Lipids
________-driven promoters are comprised of an Inr sequence and a TATA box with or without an associated BRE.
Fill in the blank(s) with the appropriate word(s).
Four of the five organs listed below are structures
through which ingested foodstuffs travel. Select the exception. a. crop b. liver c. gizzard d. large intestine e. small intestine
Cuvier, an anatomist and paleontologist, proposed that ____.
A. all present-day organisms have descended, with adaptations, from one—or possibly a few—riginal organisms B. Earth's history has been marked by several periods when destruction of populations was widespread and that, after each such period, the earth was repopulated C. evolutionary changes in organisms are caused by use and disuse D. although evolution is responsible for all the changes that happen to species, one center of creation resulted in the original members of each species E. geologic processes in Earth have not changed over billions of years