Competitive exclusion is not as common as many biologists expected, in large part because
A) there just are not that many species of organisms on Earth.
B) ecosystems are more homogeneous than was appreciated.
C) even when two species share an identical niche, they find a way to cooperate.
D) subtly heterogeneous environments allow apparent competitors to occupy separate niches.
Question 2
You are out camping in a remote area. The next day, you plan to hike the mountain trail and return to camp before dusk. Your friends suggest that after hiking, you might want to enjoy a warm shower.
They suggest that before you head out in the morning, you should suspend a strong, black cloth bag full of about 5 gallons of water, so that it sits in sunshine all day. When you return, the water should be warm, and you can enjoy a luxury because of good planning. It works and you are delighted and refreshed The process that you used to get a warm shower illustrates A) passive solar heating.
B) active solar heating.
C) solar space heating.
D) flat-plate collection.
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