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.

Biology & Microbiology

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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?

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____________ 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

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All of the following are or can be produced by microbes except

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