SharpkopLife Sciences P1 · Responses in plants and hormones
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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.
3.5.1(b)2 marks
Read the investigation described above and look at the diagram below. State TWO variables that were kept constant (controlled) in this investigation.
NSCBased on Nov 2024 · Paper 1 · Q3.5.1(b)
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