SharpkopLife Sciences P1 · Responses in plants and hormones
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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.)
3.5.2(b)1 mark
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.
NSCBased on Nov 2024 · Paper 1 · Q3.5.2(b)
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