What three things regarding cell organelles are different between plant and animal cells?

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

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.