Sherman Stories#2 Bird Beaks

How does natural selection change thephenotypes within a population over time?

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

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.