A2 Plant response 5.5.1

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OCR A level biology Module 5, Plant Responses to the Environment, and Controlling Plant Growth

Flashcards20 cardsFPractice quizPHost liveL

Questions 20

Answers

1
A non-directional response to external stimuli is known as what?
Nastic
Tropic
Trophic
Geotropism
2
What are the effects of pheromones?
Affect behaviour or physiology
Cause shoots to grow to the light
Cause a bitter taste
Prevent infiltration of microorganisms in roots
3
Thigmonasty is what?
A directional response
A trophic response
A non-directional response
A tropic response
4
Biotic means what?
non living
living
5
What is the photoperiod?
Response to water availability
Presence of infra red spectrum
Response to day length
Response to nutrient availability
6
Which of the following is not true of cytokinins?
Promote cell elongation
Delay leaf senescence
Promote cell expansion
Promote cell division
7
What is the effect of a tannin on a herbivore?
Makes a leaf taste bad
Makes a leaf curl up
Causes leaf death
Makes a leaf taste good
8
Which of the following is not a plant hormone?
Cytokinin
Gibberellin
Insulin
Auxin
9
Tannins, alkaloids and pheromones are examples of what?
Defence
Attack
Non-adaptability
10
Which hormone inhibits leaf abscission?
Abscisic acid
Gibberellins
Auxins
Cytokinins
11
Ethene does what?
Inhibits seed growth
Promote fruit ripening
Inhibit side shoot growth
Promote seed germination
12
What describes plants gaining support from other structures?
Chemotropism
Thigmotropism
Geotropism
Phototropism
13
Cell elongation is the effect of what hormone?
Gibberellins
Ethene
Cytokinins
Auxins
14
Which of the following is an incorrect method of hormone movement in plants?
Diffusion
Diffusion
Osmosis
Mass flow in phloem or xylem
15
Which of the following types of stimuli do plants respond to?
Higher temperatures
All of the above
Animal threat
Windy conditions
16
Where would chemotropism occur?
Root
Apical bud
Flower
Leaf
17
What does the following describe: directional growth response?
Nastic
Herbivore incursion
Tropism
Trophic
18
If a plant demonstrates positive geotropism, what has happened?
Plant moves towards light
Plant moves away from light
Roots move towards light
Roots move away from light
19
Like animal hormones, plant hormones need what to have an effect?
Receptor
Target cell
Effector
Sensor
20
Which of the following is not true of abscisic acid?
Causes stomatal closure
Inhibits seed growth
Promotes fruit ripening
Inhibits seed germination

A2 Plant response 5.5.1 Flashcards | StudBud

A2 Plant response 5.5.1

20 termsStudBud Administration1,100 plays

OCR A level biology Module 5, Plant Responses to the Environment, and Controlling Plant Growth

Flashcards20 cardsFPractice quizPHost liveL

Questions 20

Answers

1
A non-directional response to external stimuli is known as what?
Nastic
Tropic
Trophic
Geotropism
2
What are the effects of pheromones?
Affect behaviour or physiology
Cause shoots to grow to the light
Cause a bitter taste
Prevent infiltration of microorganisms in roots
3
Thigmonasty is what?
A directional response
A trophic response
A non-directional response
A tropic response
4
Biotic means what?
non living
living
5
What is the photoperiod?
Response to water availability
Presence of infra red spectrum
Response to day length
Response to nutrient availability
6
Which of the following is not true of cytokinins?
Promote cell elongation
Delay leaf senescence
Promote cell expansion
Promote cell division
7
What is the effect of a tannin on a herbivore?
Makes a leaf taste bad
Makes a leaf curl up
Causes leaf death
Makes a leaf taste good
8
Which of the following is not a plant hormone?
Cytokinin
Gibberellin
Insulin
Auxin
9
Tannins, alkaloids and pheromones are examples of what?
Defence
Attack
Non-adaptability
10
Which hormone inhibits leaf abscission?
Abscisic acid
Gibberellins
Auxins
Cytokinins
11
Ethene does what?
Inhibits seed growth
Promote fruit ripening
Inhibit side shoot growth
Promote seed germination
12
What describes plants gaining support from other structures?
Chemotropism
Thigmotropism
Geotropism
Phototropism
13
Cell elongation is the effect of what hormone?
Gibberellins
Ethene
Cytokinins
Auxins
14
Which of the following is an incorrect method of hormone movement in plants?
Diffusion
Diffusion
Osmosis
Mass flow in phloem or xylem
15
Which of the following types of stimuli do plants respond to?
Higher temperatures
All of the above
Animal threat
Windy conditions
16
Where would chemotropism occur?
Root
Apical bud
Flower
Leaf
17
What does the following describe: directional growth response?
Nastic
Herbivore incursion
Tropism
Trophic
18
If a plant demonstrates positive geotropism, what has happened?
Plant moves towards light
Plant moves away from light
Roots move towards light
Roots move away from light
19
Like animal hormones, plant hormones need what to have an effect?
Receptor
Target cell
Effector
Sensor
20
Which of the following is not true of abscisic acid?
Causes stomatal closure
Inhibits seed growth
Promotes fruit ripening
Inhibits seed germination