Islands are home to many of the world's rare species. Which of the following factors contributes most to this situation?

a small land area
b. geographic isolation
C. limited food source
d fewer predators

Which level of consumer had access to the smallest apply of energy

Which represents a negative impact of technology

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.