Quiz____?
Phyllotaxy -
Answer✓✓
the arrangement of leaves on a stem, is specific to each species.
Quiz____?
leaf area index -
Answer✓✓
the ratio of total upper leaf surface of a plant divided by the surface area of land on which it
grows
Quiz____?
self-pruning -
Answer✓✓
Non-productive leaves in a crop or plant go through programmed cell death (apoptosis) and
are shed to increase productivity of other leaves
Quiz____?
Passive transport -
Answer✓✓
1
, The movement of substances across a cell membrane without the use of energy by the cell -
diffusion
Quiz____?
Active transport -
Answer✓✓
transport of a substance (as a protein or drug) across a cell membrane against the
concentration gradient
Quiz____?
transport proteins -
Answer✓✓
A transmembrane protein that helps a certain substance or class of closely related
substances to cross the membrane. Those involved in passive transport do not require
energy.
Quiz____?
Proton pumps -
Answer✓✓
Use energy from ATP to pump protons out of the cell. This results in a proton gradient
with a higher proton concentration outside the cell than inside. The proton gradient across
the membrane is a form of potential energy, and the flow back can be harnessed to do
work. The inside of the cell also becomes negative in this process. Involved in active
transport.
Quiz____?
membrane potential -
2
Phyllotaxy -
Answer✓✓
the arrangement of leaves on a stem, is specific to each species.
Quiz____?
leaf area index -
Answer✓✓
the ratio of total upper leaf surface of a plant divided by the surface area of land on which it
grows
Quiz____?
self-pruning -
Answer✓✓
Non-productive leaves in a crop or plant go through programmed cell death (apoptosis) and
are shed to increase productivity of other leaves
Quiz____?
Passive transport -
Answer✓✓
1
, The movement of substances across a cell membrane without the use of energy by the cell -
diffusion
Quiz____?
Active transport -
Answer✓✓
transport of a substance (as a protein or drug) across a cell membrane against the
concentration gradient
Quiz____?
transport proteins -
Answer✓✓
A transmembrane protein that helps a certain substance or class of closely related
substances to cross the membrane. Those involved in passive transport do not require
energy.
Quiz____?
Proton pumps -
Answer✓✓
Use energy from ATP to pump protons out of the cell. This results in a proton gradient
with a higher proton concentration outside the cell than inside. The proton gradient across
the membrane is a form of potential energy, and the flow back can be harnessed to do
work. The inside of the cell also becomes negative in this process. Involved in active
transport.
Quiz____?
membrane potential -
2
