The cell membrane is made up of

1- a double layer of cellulose
2- a single layer of cellulose
3- a double layer of protein
4- a double layer of phospholipids

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.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Most of the carbon on earth is stored in the form of