Earth’s climate has had several natural climate changes due to in its orbit?

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.

What is the difference between how ionic and covalent bonds form

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above