A community may undergo a regime shift or a phase shift when ________
A) it has too many symbiotic relationships among species
B) pollutants cause a rapid rise in mutations
C) it loses a keystone species or suffers a major climatic change
D) all invasive and exotic species are removed
E) it suffers a natural fire or flood
Answer: C
You might also like to view...
Brownfields are
A. deep-well injection sites. B. state-of-the-art landfills. C. surface impoundments. D. abandoned industrial and commercial sites. E. above-ground waste storage sites.
____ was longest continuous scientific oceanographic expedition
a. The Challenger expedition b. The Fram expedition c. The Meteor expedition d. The Albatross expedition
Flagstaff, AZ is at 35 degrees N latitude. What is the angle of the Sun's noon rays here on March 21?
A) 35 degrees B) 55 degrees C) 0 degrees D) 47 degrees
A septic system is ________
A) the use of natural wetlands to cleanse wastewater B) a second level mechanism to remove bacteria at a wastewater treatment plant C) an early version of a wastewater treatment plant D) a rural method of processing wastewater E) a toxic or badly polluted waterway