Question

ESTION 3
3.1 Bob decided to see how light intensity affects flower buds opening in a particular species
of plant known as Watsonias.
He built four outside enclosures for the Watsonias. The first one was covered with one layer
of green shade cloth. The second one was covered with two layers, the third one with three
layers and the fourth one with four layers.
Watsonias flower in spring to early summer so Bob did his experiment in October with flowers
that he bought from the nursery.
In each enclosure Bob put five identical pots of Watsonias. Each pot had a single Watsonia
plant which was 20 cm high and had no open flowers. Each enclosure was placed on his
lawn in full sun. At the end of each week he counted the total number of flowers open in each
enclosure and recorded his results.
His results are show in the table below.
Number of flower buds opening on Watsonia plants in four different enclosures
over four weeks in October
Week 1 Week 2
Week 3
Week 4
17
29
2
5
15
9
0
3
7
4
3
4.
7
Enclosure No.
1 (25% shade)
2 (20% shade)
3 (75% shace)
4 (100 % shade)

3.1.2 Name ONE thing that Bob could do to ensure the validity of his experiment.
3.1.3 What can Bob conclude from his results?
TOTAL: 30​

Answer 1

Answer:

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