What types of life developed during the Paleozoic?
A. fish and amphibians
B. trilobites
C. plants and insects
D. corals, crinoids, and other creatures with shells
E. All of these choices are correct.
Answer: E
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Soil erosion is a natural process in undisturbed ecosystems.
Answer the following statement true (T) or false (F)
The most damage from the 1906 San Francisco earthquake was caused by:
a. fire. b. a tsunami. c. ground shaking. d. cracks opening up. e. landslides.
The type of agriculture practiced near large cities, which includes producing fruits and vegetables, is called
A) sawah. B) truck agriculture. C) subsistence agriculture. D) truck farming. E) truck hybridization.
If an increase in a deer population depletes the animals' food supplies, leading to a decrease in population back toward the original number, this would be an example of a positive feedback
a. True b. False Indicate whether the statement is true or false