How do corals react when water temperatures are too high?
A. They migrate to areas with lower water temperatures.
B. They slow down their shell-building processes.
C. They expel their symbiotic algae.
D. They reproduce in large numbers.
E. They produce more pigment.
C. They expel their symbiotic algae.
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Which two of the following bacteria that are strictly anaerobic with respiratory or fermentative metabolism are most similar in physiological function?
A. Desulfuromonaceae B. Geobacteraceae C. Enterobacteriaceae D. Bdellovibrionaceae
Several friends returned from a backpacking trip in a nearby state forest area and began to experience bouts of abdominal cramping, flatulence, and severe diarrhea with greasy, fatty stools. What is the most likely cause?
A. Cryptosporidiosis B. Giardiasis C. Toxoplasmosis D. Amebic dysentery
____________ occurs when a chemical signal secreted by the roots of one plant blocks the germination of nearby seeds or inhibits the growth of a neighboring plant.
A. Nodulation B. Etiolation C. Reduction D. Allelopathy E. The systemic response
All of the following are or can be produced by microbes except
A) consumer products like biodegradable plastics. B) food like chocolate. C) electronics like computer memory. D) biofuels like diesel. E) drugs like penicillin.