1. How do calcicole plants survive the high calcium content of serpentine soils?

2. Why does irrigation pose problems for croplands in arid regions? Provide an example?

3. While some animals (like snakes) get through the cold months by " hibernating" , why do some non-homeothermic organisms (like aquatic insects) stay active throughout the year?

4. Blubber maintains body heat, so why migrate?

5. Doesn't t like any of these questions? Ask one of your own, and then answer it. Note that your question should be substantive, just like your answer, and the question should be in a format that invites further discussion. Avoid questions like "Why are kittens cute?" or "Are sharks vicious?"