Types of Plant Response (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What term describes plants that cannot move freely and respond through growth and physiological changes?
What term describes plants that cannot move freely and respond through growth and physiological changes?
Sessile organisms
What is the key difference between tropisms and nastic movements?
What is the key difference between tropisms and nastic movements?
Tropisms are directional; nastic are not
Why are plant shoots positively phototropic?
Why are plant shoots positively phototropic?
To maximise light exposure for photosyn.
What type of geotropism do plant roots exhibit?
What type of geotropism do plant roots exhibit?
Positive geotropism (downwards)
Why is thigmotropism particularly important for climbing plants?
Why is thigmotropism particularly important for climbing plants?
Detect supports to curl around
How is the rapid leaf folding in Mimosa pudica controlled?
How is the rapid leaf folding in Mimosa pudica controlled?
Local bioelectrical signals
Where in plant cells are tannins stored?
Where in plant cells are tannins stored?
Vacuoles
Which alkaloid is described as a neurotoxin that can be lethal to insects?
Which alkaloid is described as a neurotoxin that can be lethal to insects?
Nicotine
What key defensive role does ethene play in plants?
What key defensive role does ethene play in plants?
Activates genes for defensive chemicals
What did Boysen-Jensen's mica barrier on the shaded side demonstrate?
What did Boysen-Jensen's mica barrier on the shaded side demonstrate?
Chemical diffuses down shaded side