Pls help! What field studies all organisms that have existed, where they came from, and how they are related?

What type of cell is produced after fertilization occurs and the gametes combines ?

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

I’m stuck on this question cuz i’m stupid sksksksk