Natural selection<span> and selective breeding can both cause changes in animals and plants. The </span>difference between<span> the two is that </span>natural selection<span> happens naturally, but selective breeding only occurs when humans intervene. For this reason selective breeding is sometimes called </span>artificial selection<span>.</span>
I believe it is the first option
The only way for gases to diffuse in and out of the leaf is through small openings on the bottom of the leaf, the stomata.
Answer:
there are 6 lava of silkworm moult.
