Duplicate of A2 Plant response 5.5.1

20 termsStudBud Administration335 plays

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

Flashcards20 cardsFPractice quizPHost liveL

Questions 20

Answers

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

Duplicate of A2 Plant response 5.5.1 Flashcards | StudBud

Duplicate of A2 Plant response 5.5.1

20 termsStudBud Administration335 plays

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

Flashcards20 cardsFPractice quizPHost liveL

Questions 20

Answers

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