How does a tropical depression form?

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.

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

If your blood becomes too concentrated with iona, what will happen to the red blood cells