A substance contains only one type of atom. The substance is alan A.
element
B.
solution
C.
mixture
D. compound

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

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.