according to the passage, there has been a decrease in the number of frogs in ecuador. which of the following is not a cause of the drop in ecuadors frog population

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.

The transport tubes from food came down the plant are called?

Which of the following is a responsibility of a scientist