Germination is the regrowth of the plant embryo after a period of inactivity. (i) What is the name given to this period of inactivity? (ii) Give one location in a seed where food is stored. (b) The diagram below shows an apparatus used to investigate the conditions needed for germination. A Seeds in dry cotton wool at 20 °C B Seeds in wet cotton wool at 20 °C C Seeds in boiled water at 20 °C D Seeds in wet cotton wool at 4 °C (i) Name a seed that could be used in this activity. (ii) Why was dry cotton wool used in test tube A? (iii) Why was boiled water and an oil layer used in test tube C? (iv) How was a temperature of 4 °C maintained in test tube D? (v) State the results observed for each test tube. A: B: C: D:

Leaving Cert Biology Plant Reproduction: Germination is the regrowth of t

Germination is the regrowth of the plant embryo after a period of inactivity - Leaving Cert Biology - Question 10 - 2022

Question 10

Germination is the regrowth of the plant embryo after a period of inactivity. (i) What is the name given to this period of inactivity? (ii) Give one location in a ... show full transcript

Worked Solution & Example Answer:Germination is the regrowth of the plant embryo after a period of inactivity - Leaving Cert Biology - Question 10 - 2022

Step 1

What is the name given to this period of inactivity?

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Answer

The name given to this period of inactivity is Dormancy.

Step 2

Give one location in a seed where food is stored.

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Answer

Food is commonly stored in the cotyledon or endosperm of a seed.

Step 3

Name a seed that could be used in this activity.

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Answer

An example of a seed that could be used is Cress (or another correctly named seed).

Step 4

Why was dry cotton wool used in test tube A?

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Answer

Dry cotton wool was used in test tube A to exclude water, which is essential for the germination process.

Step 5

Why was boiled water and an oil layer used in test tube C?

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Answer

Boiled water and an oil layer were used in test tube C to exclude oxygen and create a controlled environment.

Step 6

How was a temperature of 4 °C maintained in test tube D?

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Answer

A temperature of 4 °C in test tube D was maintained by placing it in a fridge.

Step 7

State the results observed for each test tube.

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Answer

Results observed: A: No germination B: Germination C: No germination D: No germination (allow some germination)

Germination is the regrowth of the plant embryo after a period of inactivity - Leaving Cert Biology - Question 10 - 2022

Worked Solution & Example Answer:Germination is the regrowth of the plant embryo after a period of inactivity - Leaving Cert Biology - Question 10 - 2022

What is the name given to this period of inactivity?

Give one location in a seed where food is stored.

Name a seed that could be used in this activity.

Why was dry cotton wool used in test tube A?

Why was boiled water and an oil layer used in test tube C?

How was a temperature of 4 °C maintained in test tube D?

State the results observed for each test tube.

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