Which of the following are items that are a threat to biodiversity?
pollution and succession
habitat loss and predation
poaching and habitat loss
succession and poaching

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.

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

What kinds of molecules can pass through the cell membrane without any problem?