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Flashcards in Photosynthesis + Plant Hormones Deck (23)
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1

What are the three affecting factors in terms of the rate of photosynthesis?

•Light
•Co2
•Temperature

2

What's the reaction for photosynthesis?

Co2 + H2O --> glucose + O2

3

What plant is used in the photosynthesis experiment?

Pondweed

4

Why is a gas syringe used?

More accurate than counting bubbles

5

How do you calculate light intensity?

1
____________
Distance^2

6

What is diffusion?

Particles move from a HIGH concentration to a LOW concentration

7

What is osmosis?

The diffusion of WATER across a partially permeable membrane down a concentration gradient

8

What is active transport?

Uses ENERGY to pump particles from a LOW to HIGH concentration

9

List some adaptations?

• Root hair cells
• Lots of mitochondria for active transport

10

What is water used for in transpiration?

•Carrying mineral ions
•Keeping cells rigid so the plants don't wilt
•Cooling the leaves
•Photosynthesis

11

What is water transpiration?

Water lost by the lead through evaporation via stomata

12

What is the transpiration?

• water is lost through evaporation
• water clings and climbs xylem
• water is pushed into roots by osmosis

13

What are the best conditions for transpiration?

•Hot
•Windy
•Dry

14

What is translocation?

Moving products of photosynthesis up and down the plant via phloem

15

In the algal beads experiment what is the dependant variable?

Algal beads

16

In the algal beads experiment what is the independant variable?

Light intensity

17

List some control variables in the algal beads experiment?

•Volume of water
•Number/size of algal beads
•Temperature of bulb and room

18

Why is an LED used?

So it doesn't heat up

19

List some adaptations of a leaf

Large surface area to absorb sunlight

Cuticle

Air space for diffusion of Co2 and O2

20

Phototropism.. roots and shoots

Roots- Negative
Shoots- Positive

21

How does phototropism work?

Auxins are pulled down by gravity

22

What are gibberellins used for?

To start germination

23

What is the stomata?

a tiny opening or pore that is used for gas exchange. They are mostly found on the under-surface of plant leaves