Select the sentence that best describes why plastics and rubbers are good insulators

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.

Wich organism obtains its energy from dead or decaying matter

How can you tell the difference between rough er from smooth er?