A2 Plant response 5.5.1

18 termsStudBud Administration57 plays

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

Flashcards18 cardsFPractice quizPHost liveL

Questions 18

Answers

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

A2 Plant response 5.5.1 Flashcards | StudBud

A2 Plant response 5.5.1

18 termsStudBud Administration57 plays

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

Flashcards18 cardsFPractice quizPHost liveL

Questions 18

Answers

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