5 What is true regarding keystone species?
Choose 1
They promote stability in an ecosystem.
B
They decrease biodiversity within an ecosystem.
с
They are non-native species that displaces native organisms.
They always have the largest number of organisms in an environment.

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

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.

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis