During osmosis, in which direction do the water molecules diffuse across a cell membrane?
a. from a higher water concentration to a lower water concentration
b. from a lower water concentration to a higher water concentration
c. from a lower energy concentration to a higher energy concentration
d. from a higher energy concentration to a lower energy concentration

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.