Which of the following substances may NOT pass through the cell membrane freely? oxygen, carbon dioxide, water or proteins

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?