What happens in nuclear fission reactions?
a. release neutrons as a by-product
b. occur gradually
c. release alpha particles as a by-product
d. occur spontaneously

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

Isolated volcanic peaks on the ocean floor are

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?