1. carbonic acid exchange theory
2. contact exchange theory
3. active mineral absorption
4. Donnan equilibrium
carbonic acid exchange theory
1. cofactors of enzymes
2. building blocks of important amino acids
3. constituent of hormones
4. binder of cells structure
cofactors of enzymes
1. Cu
2. Zn
3. Mn
4. Fe
Mn
1. respiration
2. expenditure of energy
3. root metabolism
4. photophosphorylation
expenditure of energy
1. free nitrogen gas
2. nitric acid
3. nitrites
4. nitrates
free nitrogen gas
1. polysaccharides
2. digestive enzymes
3. phoshpolipids
4. herbicides
digestive enzymes
1. found mainly in ferns
2. found mainly in non-vascular plants
3. common among angiosperms
4. rare outside tropical forests
common among angiosperms
1. increased ion uptake in the presence of O2
2. decreased ion uptake in the presence of O2
3. increased in uptake in the presence of ATP
4. increased ion uptake in the presence NAD
increased in uptake in the presence of ATP
1. Evolution of heat
2. Availability of light and heat
3. Presence of light
4. Availability of energy
Availability of energy
1. cyclic AMP
2. acetylcholine
3. ATP
4. stimulation exit of like molecules
ATP