Hunters and gatherers, or foragers, did not modify their landscapes
a. True
b. False
Indicate whether the statement is true or false
False
RATIONALE: All across their growing range, our pre-agricultural ancestors shaped the face of the land on a vast scale relative to their small numbers.
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Which of the following statements describes thunderstorms that produce tornadoes?
A. They have rotating updrafts. B. They have very little cloud-to-ground lightning. C. They will not produce hail. D. They have updraft velocities below 167 km/h.
In this image from Tibet, water is expressed in a visible form through
A) water vapor in the atmosphere.
B) clouds suspended in the atmosphere.
C) ice and snow.
D) clouds, ice, and snow.
E) All of the answers here are correct.
In the Mississippi River delta in south Louisiana shallow subsurface imaging of the sediments reveal buried channels beneath delta sediments that are less than 10,000 years, and these channels extend offshore to the edge of the continental shelf
What is a simple explanation for these buried channels? A) They represent giant flood events before the delta was formed and before the river formed. B) Turbidity currents cut a submarine canyon on the shelf before the delta buried them. C) They represent channels of the Mississippi river delta when sea level was lower, during the ice age. D) The river must have been bigger in the past, cutting a channel clear to the edge of the shelf below sea level.
Why do marine mammals look and behave similar to fish?
a) they both evolved from the same aquatic ancestor b) they both have adapted for moving efficiently in water c) Marine mammals learn from fish how to behave in the water d) Both fish and marine mammals are top predators e) Both fish and marine mammals are warm-blooded