I think the correct answer from the choices listed above is the third option. The DNA is used as a molecular clock in the sense that the <span>percent of carbon in DNA is compared between parent and offspring. Hope this answers the question. Have a nice day.</span>
1. The correct answer is: cell recognition protein
2. The correct answer is: The nonpolar tails are repelled by water, so they position themselves in the middle of the bilayer. The polar heads are attracted to water, so they point outward.
3. TRUE is As cell size decreases, the surface area-to-volume ratio increases.
4. The correct answer is: have no nucleus
have no membrane-bound organelles
