How does new antibiotic kill pathogens without detectable resistance apply to my life?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

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.

A(n) is a molecule influences the way that a molecule reacts.