PLz help ASAP tell me if this is correct or not if it isn't then plz do tell me what I need to change it to

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above