Which of the following polymers provide protection in the plasma membrane? a)proteins b)lipids c)starches d)nucleic acids

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

What are the formed elements (cell or parts of cell) in blood and what are their functions ?