10. (a) (i) State a location in plants where growth regulators are produced - Leaving Cert Biology - Question 10 - 2022
Question 10
10.
(a) (i) State a location in plants where growth regulators are produced.
(ii) How are growth regulators transported around a plant?
(b) Answer the following q... show full transcript
Worked Solution & Example Answer:10. (a) (i) State a location in plants where growth regulators are produced - Leaving Cert Biology - Question 10 - 2022
Step 1
State a location in plants where growth regulators are produced.
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Answer
Growth regulators are produced in the apical meristem or the root tips of plants.
Step 2
How are growth regulators transported around a plant?
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Answer
Growth regulators are transported through the plant primarily via diffusion and through vascular tissues, specifically the phloem and xylem.
Step 3
Name a suitable plant tissue you used in this investigation.
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Answer
A suitable plant tissue used in the investigation is the root or shoot tissue.
Step 4
Describe how you set up the investigation.
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Answer
To set up the investigation, different concentrations of IAA were prepared. Equal volumes of each solution were applied to sections of the plant tissue. Controls were included, and the apparatus was left to incubate for a specified time to observe growth differences.
Step 5
Describe how you measured the effect of IAA on the plant tissue.
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The effect of IAA on the plant tissue was measured using a ruler or grid to measure the growth of the tissue over time.
Step 6
Describe one result of your investigation.
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One result of the investigation was that plant tissues exposed to higher concentrations of IAA exhibited more root growth compared to those exposed to lower concentrations.
Step 7
Describe one safety precaution you took in carrying out this investigation.
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One safety precaution taken was wearing safety goggles and a lab coat to protect against any spills or exposure to the chemical solutions.
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