Planarians have a branched digestive tract with both a mouth and an anus.

a. True

b. False

Witch of the following blood vessels has the largest diameter? A. Arteries B. Arterioles C. Capillaries D. Veins

List 3 ways the sun is different from the planets

The ground tissue of roots is composed of what types of cells?

Use a diagram to show how ions are formed when a sodium atom comes into close contact with a chlorine atom

What do coral and algae share

An organism that is heterozygous for a particular character will generally show the recessive trait. a. true b. false

Some speciea undergo long peiods of stability interrupted by geologically brief periods of signifficant change. During these brief periods, new species may evolve. This pattern of evolution is part of the concept of

Darwin and Haeckel used the analogy of a wheel to represent phylogenies.

What is allele frequency

Why do rocks vary in color?