Investigate Effect Of IAA Growth On A Plant Tissue

Question 1

What was the purpose of a serial dilution of the IAA solution

Answer 1

To make different concentrations of IAA

Question 2

Why did you place the seeds on a grid in Petri dishes?

Answer 2

To measure root and shoot growth more accurately

Question 3

How did you carry it out?

Answer 3

Tissue exposed to different concentrations of IAA. (A-H, H being the control)
Place 9ml of water into each dish
Place graph sheet in dish
Place 5 cress seeds onto graph
Place filter paper onto seeds
Place a drop of different IAA concentrations into each dish
Tape dish shut
Leave in a warm place ~25 degrees
Leave for 2 days
Measure growth
Compare results

Question 4

Results

Answer 4

The higher IAA concentration, the greater the shoot growth, lower IAA concentrations for root growth

Question 5

Tropism

Answer 5

Growth response to a stimulus

Question 6

What’s a plant growth regulator?

Answer 6

Controls growth of a plant

Question 7

Plant tissue

Answer 7

Cress or radish seeds

Question 8

Control used

Answer 8

Water

Question 9

An example of growth regulator

Answer 9

Auxin