Weeds most commonly exhibit which population growth characteristic?
A. r selected and a pattern that appears as a J-curve on a graph
B. A pattern that appears as a J-curve on a graph
C. K selected and a pattern that appears as a J-curve on a graph
D. r selected
E. K selected
Answer: A
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At the San Andreas fault, the Pacific Plate is moving northwest relative to the southeast moving North
American Plate. Therefore, movement along the San Andreas is: a. compressional b. tensional c. right-lateral d. left-lateral e. vertical
How do modern telescopes prevent problems of earlier telescopes that limited mirror size and stability during temperature changes?
A) They only use telescopes in space to avoid the atmosphere. B) They use a digital imaging system and process the image to remove distortions. C) They use a mirror that is constantly adjusted in shape to adjust for changes in atmospheric distortions. D) They use a super refraction system that uses a series of small lenses that avoid chromatic effects to collect more light than previously possible.
Tenny shoots an arrow. If we call action force that of the bowstring on the arrow, the reaction is the
A. arrow's push on the bowstring. B. air resistance on the bow. C. friction of the ground on Tenny's feet. D. weight of the arrow.
Why hasn't the use of catalytic convertors reduced the amount of CO2 in the atmosphere?
A. CO2 is increased by their use. B. They only breakdown VOCs. C. They simply don't work. D. They only breakdown NO2.