For a species to be on the endangered list there must be organisms of the species left. 2,000
2,500
1,000
3,000

Florian discovers a rock that is broken into pieces. each piece has several bands. which type of rock does florian predict these pieces will change into when subjected to heat and pressure? igneous magma metamorphic sedimentary

As a small change in a person's dna can cause a genetic disorder

What advantages does a pedigree have over a written passage?