What happens to a species if its genetic diversity is low?

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

Wich organism obtains its energy from dead or decaying matter

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.