What type of cells are produced after fertilization occurs and the gametes combine?
a) an egg cell
b) a sperm cell
c) a diploid zygote
d) a haploid zygote

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

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.

Explain how scientists use geologic time to determine the age of landforms.