Photosynthesis + Plant Hormones

Question 1

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

Answer 1

• Light
• Co2
• Temperature

Question 2

What’s the reaction for photosynthesis?

Answer 2

Co2 + H2O –> glucose + O2

Question 3

What plant is used in the photosynthesis experiment?

Answer 3

Pondweed

Question 4

Why is a gas syringe used?

Answer 4

More accurate than counting bubbles

Question 5

How do you calculate light intensity?

Answer 5

1
____________
Distance^2

Question 6

What is diffusion?

Answer 6

Particles move from a HIGH concentration to a LOW concentration

Question 7

What is osmosis?

Answer 7

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

Question 8

What is active transport?

Answer 8

Uses ENERGY to pump particles from a LOW to HIGH concentration

Question 9

List some adaptations?

Answer 9

• Root hair cells

* Lots of mitochondria for active transport

Question 10

What is water used for in transpiration?

Answer 10

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

Question 11

What is water transpiration?

Answer 11

Water lost by the lead through evaporation via stomata

Question 12

What is the transpiration?

Answer 12

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

Question 13

What are the best conditions for transpiration?

Answer 13

• Hot
• Windy
• Dry

Question 14

What is translocation?

Answer 14

Moving products of photosynthesis up and down the plant via phloem

Question 15

In the algal beads experiment what is the dependant variable?

Answer 15

Algal beads

Question 16

In the algal beads experiment what is the independant variable?

Answer 16

Light intensity

Question 17

List some control variables in the algal beads experiment?

Answer 17

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

Question 18

Why is an LED used?

Answer 18

So it doesn’t heat up

Question 19

List some adaptations of a leaf

Answer 19

Large surface area to absorb sunlight

Cuticle

Air space for diffusion of Co2 and O2

Question 20

Phototropism.. roots and shoots

Answer 20

Roots- Negative

Shoots- Positive

Question 21

How does phototropism work?

Answer 21

Auxins are pulled down by gravity

Question 22

What are gibberellins used for?

Answer 22

To start germination

Question 23

What is the stomata?

Answer 23

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