1.) Population density.
2.)Growth rate.
3.)Birth rate.
4.)Death rate.
It's either species eat or populations evolve. Think about the food chain, about how it transfers energy through organisms.
Honestly I'd say a biologist studying the liver in mice, would figure out a drug to help the liver metabolize drugs and detoxify chemicals. I'd think they would figure out a way to prolong life by increasing liver health, and help remove Bile buildups that can occur. Both in human and in mice.
3. naturally occurring
4. fossilized plants or air bubbles ( probably the plants tho)
5. increased
6. the green house effect occurs naturally, it is being polluted both naturally and unnaturally, the unnatural pollution is contaminating our 'greenhouse" and that is horrible.<span />
Answer:
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