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Flashcards in Plants Deck (23)
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1
Q

What is the chemical equation for photosynthesis?

A

6CO2 + 6H2O + energy –> C6H12O6 + 6O2

2
Q

What is in the vascular bundle?

A

Xylem and phloem

3
Q

What is involved in transport of water in a plant?

A

Root pressure
Adhesion
Cohesion (Water is a polar molecule so it sticks to itself)
Transpiration (water goes out through stomata)

4
Q

Say something about capillaries…

A

They are one cell thick

5
Q

In a leaf cross section, there are… (top –> bottom)

A
Upper epidermis (and waxy cuticle)
Palisade
Spongy Mesophyll
Vascular bundle
Lower epidermis (and stomata and guard cells)
6
Q

How do guard cells work?

A

Potassium comes in, water flows in through osmosis, the cells swell up and open. To close the potassium leaves and so then the water goes out through osmosis.

7
Q

What is the function of the waxy cuticle?

A

Keeps out water from passing through the upper epidermal cells.

8
Q

Efficient cells should have

A

High surface area : low volume ratio

9
Q

Why is the SA:V ratio in a cell important?

A

High SA: can absorb lots of things (ie. sunlight) and creates more space for things to diffuse across
Low V: Less distance to cover for transporting nutrients to all parts of the cell. Also easier to get info to the nucleus.

10
Q

What is gravitropism?

A

Growing in the direction gravity is pushing the plant.

11
Q

What is phototropism?

A

Growing towards the light.

12
Q

Where does most of photosynthesis happen?

A

Palisade cells

13
Q

What is the function of spongy mesophyll?

A

Provides space for gas exchange

14
Q

What does the xylem do?

A

Transports water

15
Q

What does the phloem do?

A

Transports glucose and nutrients

16
Q

What makes up the membrane?

A

Phosphoheads and fatty acid tails.

17
Q

What in the membrane doesn’t like water?

A

The fatty acid tails are hydrophobic.

18
Q

What do root hairs do?

A

Increase the surface area of roots for the absorption of water.

19
Q

What is transpiration?

A

Process of water vapor leaving the leaf through stomata.

20
Q

What is cohesion?

A

Water molecules attach to each-other because they are polar.

21
Q

What is adhesion?

A

Water is attracted to and attaches itself to other substances

22
Q

What is root pressure?

A

Upward force exerted on water in the xylem.

23
Q

What are tropisms?

A

Control systems. Ie. phototropism and gravitropism