Summarize how unicellular organisms may have
given rise to the first animals.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

What is the difference between an igneous, sedimentary and metamorphic rock

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.