How does cladistics us understand phylogeny

Which element provides strength to the exoskeleton of clams and oysters

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

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.