Earthworms help the soil by:
a. Breaking up the soil to allow air to reach the plant roots
b. Breaking up the soil to allow water to reach the plant roots
c. Leaving castings that contain rich fertilizing ingredients
d. All of the above
Correct answer: b
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What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
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Piaget's ideas were largely ignored by American psychologists until the 1960s. Three of the following are probable reasons why this was so. Which one is not a likely reason?
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