Geotropism (Grade 12 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is geotropism?
What is geotropism?
A plant's growth response to gravity
Why can geotropism occur in complete darkness?
Why can geotropism occur in complete darkness?
Plants can sense gravity directly
Which plant parts show positive geotropism?
Which plant parts show positive geotropism?
Roots
What is a key benefit of positive geotropism in roots?
What is a key benefit of positive geotropism in roots?
Access to water and minerals deeper in soil
Which plant parts demonstrate negative geotropism?
Which plant parts demonstrate negative geotropism?
Stems and shoots
What effect does high auxin concentration have in roots?
What effect does high auxin concentration have in roots?
Inhibits cell growth
What effect does high auxin concentration have in shoots?
What effect does high auxin concentration have in shoots?
Promotes rapid cell elongation
What happens to auxins when a plant is placed horizontally?
What happens to auxins when a plant is placed horizontally?
They accumulate on the lower side
In a horizontal root, which side grows faster causing downward bending?
In a horizontal root, which side grows faster causing downward bending?
Upper side with fewer auxins
What happens when a seed is planted sideways in soil?
What happens when a seed is planted sideways in soil?
Root curves down, shoot curves up