About how many years ago do scientists suggest that the earth cooled enough for water vapor to condense.

A) 20 millions years

B) 4.6 billion years

C) 4.4 billion years

D) 5.5 billion years

Biomolecules are organic molecules that are produced by living organisms to perform a variety of functions. Classify each of the biomolecules as a carbohydrate, lipid, nucleic acid, or protein.

Which phase of mitosis does this statement accurately describe: During this phase, the division of a cell is complete and the end result is two daughter cells. A. Cytokinesis B. Anaphase C. Metaphase D. Anaphase

Which of these tools is used to transfer a gene into an animal? a. molecular scissors B. vector C. ligase enzyme

If you stir salt into boiling water, what do you produce?

What are the basic building blocks of living organisms

Identify each statement as a hypothesis, theory, or law. Higher air pressure causes fuel to burn at a faster rate.

Which sequence represents the correct levels of organization for multicellular organisms

Which statement best compares and contrasts lipids and carbohydrates? Both are used for tissues, but only carbohydrates are used for tissue growth. Both are used for energy storage, but only carbohydrates are used for long-term energy storage.

What is another name for lane d in the diagram

This is the energy stored as adipose tissue:.