(D) Invasive species
(E) Tourists
- A certain species of plant is placed on the threatened species list. Several
years later it is placed on the endangered species list. This is an example of
(A) a negative-negative feedback loop
(B) a positive-negative feedback loop
(C) a negative-positive feedback loop
(D) a negative feedback loop
(E) a positive feedback loop
- The specific form of radiation that is largely responsible for the formation
of ozone in the stratosphere is (A) UVA
(B) UVB
(C) UVC
(D) infrared
(E) gamma rays
- Which of the following is NOT an effect caused by increased levels of
ultraviolet radiation reaching Earth?
(A) Warming of the stratosphere
(B) Cooling of the stratosphere
(C) Increased genetic damage
(D) Reduction in immunity
(E) Reduction in plant productivity
- Which of the following gases is NOT considered a greenhouse gas,
responsible for global warming?
(A) SO 2
(B) N 2 O
(C) H 2 O
(D) SF 6
(E) CH 4
- Which of the following effects would result from the shutdown or
slowdown of the thermohaline circulation pattern?
