A membrane that only “lets” certain molecules in while keeping other molecules out is___

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.

Explain how organisms could be harmed by high levels of salt from roadways?

Which of the following graphs have the same wavelengths