# Life Sciences Paper 1, November 2024, question 3.5.3

> Explain how the researchers made sure the results of this investigation... Marked mark by mark. Q3.5.3, Life Sciences Paper 1 November 2024, 2 marks.

Canonical: https://sharpkop.co.za/life-sciences/2024-nov-p1/q3-5-3/
Last updated: 2026-11-12

Subject: Life Sciences. Source: Based on Nov 2024 · Paper 1 · Q3.5.3. Marks: 2. Not yet checked by a teacher.

## Question 3.5.3 (2 marks)

A learner investigated how a plant hormone affects the way shoots bend towards light. The investigation was done as follows:
- Fifteen seedlings of the same species were split into three groups, X, Y and Z, with five seedlings in each group.
- All the seedlings were kept in a dark cupboard for 48 hours.
- The shoot tips of group X were left untouched.
- The shoot tips of group Y were removed and each was replaced with a block of agar jelly containing auxins.
- The shoot tips of group Z were removed and each was replaced with a block of agar jelly containing no auxins.

Explain how the researchers made sure the results of this investigation were reliable.

## Practise it

[Answer this question](https://sharpkop.co.za/life-sciences/2024-nov-p1/q3-5-3/) 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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