Many cacti, such as saguaros and barrel cacti, have large stems and no leaves. what function of leaves is taken on by the stems of such cacti?
a. they produce food by photosynthesis.

b. they absorb water and nutrients from the soil.

c. they transport materials throughout the plant.

d. they store excess water.

Osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. what really drives osmosis? view available hint(s)osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. what really drives osmosis? the first law of thermodynamicsthe difference in the height of water columns on either side of a selectively permeable membranethe difference in water concentration across a selectively permeable membranethe difference in sugar or ion concentration across a selectively permeable membrane

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.