# Life Sciences Paper 1, November 2024, question 3.5.1(b)

> Read the investigation described above and look at the diagram below. Marked mark by mark. Q3.5.1(b), Life Sciences Paper 1 November 2024, 2 marks.

Canonical: https://sharpkop.co.za/life-sciences/2024-nov-p1/q3-5-1-b/
Last updated: 2026-11-12

Subject: Life Sciences. Source: Based on Nov 2024 · Paper 1 · Q3.5.1(b). Marks: 2. Not yet checked by a teacher.

## Question 3.5.1(b) (2 marks)

A learner investigated how a plant hormone affects the way shoots grow. Nine bean seedlings of the same species were split into three groups of three seedlings each. All the seedlings were kept in a dark cupboard for 48 hours.
- Group P: the shoot tips were left on and not treated.
- Group Q: the shoot tips were removed and replaced with a block of agar jelly that contained auxins.
- Group R: the shoot tips were removed and replaced with a block of agar jelly that contained no auxins.

Read the investigation described above and look at the diagram below. State TWO variables that were kept constant (controlled) in this investigation.

Figure: Three seedlings standing in a dark cupboard at the start of the experiment. The first (P) still has its shoot tip. The second (Q) has had the tip cut off and has a small block of agar jelly containing auxins on the cut end. The third (R) has had the tip cut off and has a block of plain agar jelly with no auxins on the cut end.

## Practise it

[Answer this question](https://sharpkop.co.za/life-sciences/2024-nov-p1/q3-5-1-b/) and see it marked mark by mark, with the reason for every lost mark.

## Related

- [More plant responses to the environment questions](https://sharpkop.co.za/life-sciences/plant-responses/)
- [Life Sciences Paper 1, November 2024](https://sharpkop.co.za/life-sciences/2024-nov-p1/)
- [Grade 12 Life Sciences past papers](https://sharpkop.co.za/life-sciences/)

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