When the sun produces energy, it consumes hydrogen and produces

A radium

B helium

C nitrogen

D chromium

One advantage and one disadvantage of using oil rather than coal to generate electricity

The calf muscle that bulges when a woman wears high heels is called the

As an animal ages and its hair turns white, the medulla becomes filled with A. water. B. melanin. C. air. D. fat.

A standard of comparison in an experiment is called the

Explain how oral contraceptives work to prevent pregnancy

Is a fossil still a fossil if it is preserved artificially? For example, (Is a mummy a fossil even though it was preserved by people?)

Which type of macromolecule is the quickest source of energy for the body

Which two structures contain DNA

When reproduction is achieved through meiosis and subsequent fertilization it is called?

Which statement is correct? A. Both plants and fungi undergo photosynthesis. B. Both protists and fungi are eukaryotic. C. Like some prokaryotes, fungi are autotrophic. D. Both animals and fungi lack cell walls.