It’s true (a) because bones become brittle and easier to break if theyre not used. bones more frequently used become stronger.
D because gravitational force cannot pull or push
Answer:
The main difference between the two is that arachnids have eight legs (four pairs of legs) while insects have six (three pairs of legs).Another clear difference is that arachnids don't have antennae or wings all insects, though, have antennae, and also have wings
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Answer:
the hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change.
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