Answer:
The organisms that fit in boxes 2 and 7 only
C. When you take a step, the ground pushes back on your foot with the same amount of force. If it pushed back with less, your foot would go through the floor; if it pushed back with more, it would actually push your foot off the ground. But they're in opposite directions; your foot pushes down, while the ground pushes up.
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A virus's ability to infect an animal cell depends primarily upon the "<span>presence of receptor sites on the cell membrane"
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Answer:
The answer is letter B
Explanation:
A cell contains thousands of different kinds of enzymes, each promoting a different chemical reaction.
