How do CFCs affect the concentration of ozone in the stratosphere and contribute to the formation of the ozone hole?
What will be an ideal response?
CFCs release chlorine atoms and damage the stratospheric ozone layer. CFCs combine with the ultraviolet rays of the Sun to release chlorine that can combine with ozone and cause it to break down. "Chlorine acts as a catalyst, a chemical that promotes a chemical reaction without itself being used up in the reaction." This catalytic response of chlorine can cause the damage of an untold amount of ozone, leading to significant areas of depletion.
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Many predator-prey relationships do not result in the complete elimination of the prey because
A) predators cannot catch all of the healthy adults and will shift to other prey if one species is scarce. B) the predator population is limited by the availability of territorial space. C) a single species of prey does not provide enough nutrition. D) the prey populations are always far below carrying capacity.
Why is plate tectonics critical to the maintenance of an atmosphere-ocean reservoir rich in carbon?
What will be an ideal response?
Type 2 diabetes is the world's most preventable major cause of premature death among adults.
Answer the following statement true (T) or false (F)
Planktonic larval forms are an adaptation to cope with which of the following adverse conditions of the rocky intertidal zone?
A) Difficulty finding mates B) Drying out during low tide C) Lack of space or attachment sites D) Predators E) Strong wave activity