Who is in Penn Foster

Which statement best. describes the fossil record? it is a complete record it is an incomplete record most fossils are older than 5. billion years all fossils are younger than 600 years

How is waste removed from the cell? A.) bleeding B.) diffusion C.) leaking D.) none of the above

Carbon dioxide is also released into the air through?

Which statement is correct? Theories are accepted as true when a single experiment yields similar results to another one. When a scientist finds a new way to test a hypothesis, experimental methods do not change.

What percentage of US 12th graders have used marijuana in their lifetime?

Why are some sediments smaller than others

Ethanol is produced during what cycle or fermentation

Explain briefly why there is a limitation on how big a cell can be. Include in your explanation the relationship between a cell's size and its surface area and how this affects what the cell can do.

Which effect is most likely caused by nondisjunction during meiosis? A. an extra chromosome B. an increase in nuclei C. increased survival benefits from traits D. only two types of nitrogenous bases

A segment of dna that codes for rna and a protein is a