Leaf And Crap Flashcards
(25 cards)
Hypertonicity?
There is more solute outside than inside. There is more water inside that outside.
Isotonic?
The solute inside and outside of the leaf is balanced. The water is also balanced.
Hypotonicity.
The solute inside is higher than the solute content outside. The water inside is lower than the content outside.
What is the epidermal cell?
Form protective layer. One cell thick. Transparent. No chloroplasts
Cuticle.
Covers epidermal. And prevents evaporation of water. Waxy. Secreted.
Palisade tissue cell
Located underneath upper layer.
Contains most chloroplasts.
Important photosynthesis. Green
Spongy mesophyll
Below palisade. Loose.
Help exchange gasses.
Stomata and guard cells
Small openings in epidermal layer.
Allows water to enter and leave.
Located mostly on underside.
2 lips.
Vascular tissue cells?
Series of tubes that transport fluid.
Xylem. Phloem.
Phloem.
Carries sugar produced in leaves to other parts of the plant.
Xylem?
Thick walled tubes. Inside.
Cohesion in water?
Water molecules are attracted to other water molecules.
Adhesion.
Water molecules are attracted to other substances.
Root pressure.
Dissolved minerals enter xylem cells through active transport. Dissolve minerals create hypotonic situation. Forcing more water in.
Lenticel?
Natural openings found on the stems of trees. Herbaceous. Provide path for gas exchange.
What do plants respond to?
Stimuli.
Phototropism? What is it.
Movement in respond to light stimulant.
When the plant has positive phototropism.
It grows towards the light.
When the plant has negative phototropism.
grow away from the light. Roots
Where are the stimulants in the grass.
At the top of the grass.
Why does the grass bend over in teaponse to stimulants.
Light facing leaves send signals to lose weight well dark side leaves send signals to gain weight. Thus bending the leave to better face the sun.
Who made the discovery thats cells grow depending on light stimulant.
Boysen jensen
Gravitropism.
A plant responds to the force of gravity.
Negative Gravitrotopism.
Things that grow against the gravitational force.
