<span>Answer A is correct because humans release tons of chemicals into the environment every single day. All it takes to disrupt an entire ecosystem is a chemical released into their water source, which in time slowly poisons the animals. Say a rabbit was drinking the polluted water and is now carrying the poison in it's body. A coyote comes along and eats the poisoned rabbit, and the coyote is now poisoned. That threw off the natural food chain.</span>
Answers:
1.) D
2.) B
The pons plays a crucial role in REM sleep, which is the state of sleep in which dreaming occurs.
Physics is not a branch of natural "sciencie".
Hydrogen Gas has been nonexistent in the atmosphere since that time period
<span>Darwin found conglomerate rocks which were important because they held Lots of shells and fossils of teeth and bones of Huge extinct mammals.
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