Microorganisms that produce disease are called:
a. histiocytes
b. macrophages
c. pathogenic
d. lymphocytes
c. pathogenic
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What is characteristic of a mudflat?
a. present on the ocean floor b. present at the bottom of eutrophic lakes c. found in estuaries d. lack bacterial biofilms e. low salt content
All EXCEPT which of the following are
disadvantages to sociality? a. predator avoidance b. cannibalism c. competition for food d. contagious diseases e. parasite infestation
Chromatids are ____________________.
A. attached at the centriole. B. a pair of chromosomes, one from the mother and one from the father C. attached to the nuclear envelope D. identical before and after crossing over occurs. E. identical until crossing over occurs
The evolution of organisms that use oxygen in their respiration was possible only because of the action of a group of bacteria that produced oxygen and changed the Earth's atmosphere from an anoxic one to one rich in oxygen. That group of bacteria was:
A. cyanobacteria B. proteobacteria C. spirochaetes D. Staphylococcus E. actinobacteria