Why do testicle need to keep cool at an certain, degrees?

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

Which description provides the best objective summary of the article in the passage?

Recommend a strategy for incorporating sustainable human activity into a tropical rain forest biome.