Generally speaking, the third agricultural revolution occurred when?
A) about 2,000 years ago
B) about 1,000 years ago
C) in the 18th century
D) in the 20th century
E) It just started with the introduction of GMOs.
Answer: D
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Space debris that collides with Earth comes primarily from fragmented asteroids and secondarily from comets.
Answer the following statement true (T) or false (F)
Which of the following are pioneer species on recently glaciated rock?
A) evergreens and fir trees B) spruce and fir trees C) lichens and mosses D) maples and redwoods E) herbs and shrubs
Which combination produces the strongest Coriolis force?
A) fast winds and low latitude B) fast winds and high latitude C) slow winds and low latitude D) slow winds and high latitude
In its evolutionary sense, fitness reflects the ability to respond to
A) other members of the same species with whom resources are shared. B) abiotic environmental factors such as drought, hurricanes and fires. C) develop a comprehensive survival strategy (niche) for maintaining a sustainable population. D) predators, parasites and other agents of disease.