# Life Sciences Paper 1, November 2024, question 3.5.2(b)

> A learner studied how auxins affect the growth of shoots, using the... Marked mark by mark. Q3.5.2(b), Life Sciences Paper 1 November 2024, 1 mark.

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Last updated: 2026-11-12

Subject: Life Sciences. Source: Based on Nov 2024 · Paper 1 · Q3.5.2(b). Marks: 1. Not yet checked by a teacher.

## Question 3.5.2(b) (1 mark)

Fifteen seedlings of the same species were split into three groups (X, Y and Z) of five seedlings each. All the seedlings were kept in a dark cupboard for 48 hours.
- Group X: the shoot tips were left untouched.
- Group Y: the shoot tips were removed and a block of agar jelly containing auxins was placed on each cut surface.
- Group Z: the shoot tips were removed and a block of agar jelly with no auxins was placed on each cut surface.
(Auxins can diffuse through agar jelly.)

A learner studied how auxins affect the growth of shoots, using the set-up described and shown in the diagram below. State the result you would expect for the plants in the control group, Group Z.

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

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[Answer this question](https://sharpkop.co.za/life-sciences/2024-nov-p1/q3-5-2-b/) and see it marked mark by mark, with the reason for every lost mark.

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