Pure breeding means the same as selective breeding since you take two animals and combine their traits for certain reasons
The answer is the first one. Diffusion is water only while osmosis can be for gasses
A man is 100,000 times larger in micrometers than the amoeba, since 17 micrometers is 0.000017 meters, and 1.7 meters is 1,700,000 micrometers
i think its more intense light, absorbed more carbon dioxide, and absorbed more oxygen