Which of the following is not a phenomenon on the surface of the sun?
Solar flares
supernovae
prominences
sunspot

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?