Which kind of bone is hard and dense and contains canals for blood vessels?

Blood cells are made in your

What molecule carries genetic form?

What is the difference between an antibiotic an anti-viral

Which causes objects in the universe to resist a change in speed or direction?

Zoe has lived in the United States all of her life, yet her Greek grandmother has made sure that Zoe is fluent in the Greek language, so she would understand the Greek way of life.

Compare the age of ocean rocks to that of continental rocks. How does this difference support the idea of seafloor spreading?

An element's atomic number is 5. How many protons would an atom of this element have?

Biology is the study of living things. Why do you think viruses are discussed in biology books?

How many cotyledons would be found in a flowering plant with nine petals on each flower and long leaves with parallel leaf veins? a. Three b. Zero c. Two d. One

Use photosynthesis in a sentence