Ecological systems often undergo periodic disturbances
A. only in arid environments.
B. such as floods and fires.
C. and show resilience when they recover quickly.
D. such as floods, fires, and show resilience when they recover quickly.
Answer: D
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What is the largest marine community?
a. Intertidal community b. Photic zone community c. Between the photic zone and the deep bottom d. Deep bottom communities
Removing coral reefs is a good way to reduce the damage caused by tsunami.
Answer the following statement true (T) or false (F)
Briefly comment on the research to determine the toxicity of bisphenol A (BPA)
Also, explain why this topic represents a challenge to scientific integrity and credibility and the implications for national and international policies on this compound that depend on the research.
DDT, DDE, PCBs, and PBDEs are all ________
A) non-biodegradable and subject to bioaccumulation and/or biomagnification B) biodegradable and do not persist in the environment C) toxic at the organism level but not at the ecosystem level D) teratogens E) approved for use as pesticides by the EPA