Dog breeds are a classic example of artificial selection. Which of the following is another example of artificial selection?
A) choosing what kind of holiday greenery to purchase
B) breeding wild cabbage to create broccoli and cauliflower
C) chimney swifts adapting to human presence and selectively nesting in chimneys
D) crossing a lion and a tiger to get a sterile animal called a liger
E) inserting a gene for herbicide resistance into soybeans
Answer: B
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Which of these four lakes could be replenished by groundwater?
A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 1 and 4
E) None of these are correct.
Humans are most closely related to ____
a. Chimpanzees b. New World monkeys c. gorillas d. prosimians e. Old World monkeys
The North Atlantic Free Trade Agreement (NAFTA), which became effective in 1994, eliminated most barriers to moving goods between Mexico and the United States
Indicate whether the statement is true or false.
Which descriptor is true of a tropical rain forest?
A. They have high net primary productivity. B. They have many plants living at ground-level. C. They receive high levels of ground level sunlight. D. They have little biodiversity. E. They have nutrient-rich soil.