Which statement is true about gold and helium? O A. They both occur as a gas at room temperature.
B. They are both made of subatomic particles.
c. They are both used in balloons.
D. One of made of protons and the other of only electrons.

The answer is B

Explanation:

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.