17. Which substance on the plasma membrane helps identify chemical signals from outside the cell? a. receptor proteins b. transport proteins c. marker proteins d. cholesterol​

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

How water is moving through the ecosystem ?

Which are reasons cells undergo cell division?