Scientists have linked increased wildfire in the American West since 2000 to all of the following except
A) El Niño events.
B) earlier spring snowmelt.
C) fuel load build-up due to fire suppression.
D) changes in natural fire regimes.
E) increased spring and summer temperatures.
A
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What is the term for vertebrates who have a skeleton made of cartilage?
a. Osteichthyes b. Chondrichthyes c. Reptilia d. Ophiuroids
A particular preference for a new clothing style is more likely than a folk custom to
A) evolve rapidly owing to the isolation of different groups. B) rapidly diffuse through modern communication and transportation. C) reflect the unique characteristics of the physical landscape. D) have an unknown source of origin. E) resist the influences of multinational corporations.
When populations approach their carrying capacity, their resources ________
A) become more scarce and growth rate approaches zero B) increase because populations are decreasing C) increase in supply but are less accessible D) are not a concern as they are usually infinite in supply E) decrease in supply but are more accessible to competitors
Radiation is made of discrete packets of energy called ____
A) thermals B) convective cells C) photons D) microns