Heat energy is

Osmosis is the diffusion of ________ across a selectively permeable membrane.

This is a sagittal section through the abdominopelvic cavity. What cavity does “D” represent?

Which of the following is a component of a nucleotide?

Covalent bonds form when

Hydrogen bonds form between molecules containing ________ bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially ________ charged atom of another.

Which of the following is a synthesis reaction?

Which of the following statements best describes RNA?

The cavity of the body immediately inferior to the diaphragm is the ________ cavity.

In an x-ray film of the skeletal system, the dense tissue areas appear ________ because they ________ the x-rays; and the less dense tissues appear ________ because they ________ the x-rays.