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Unit 1, Topic 2 - Plant systems – gas exchange and transport systems Flashcards | StudBud
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Unit 1, Topic 2 - Plant systems – gas exchange and transport systems
Unit 1, Topic 2 - Plant systems – gas exchange and transport systems
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QCAA Biology Unit 1 Topic 2 - Plant systems – gas exchange and transport systems
Flashcards
26 cards
F
Practice quiz
P
Host live
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Questions
26
Answers
1
What happens to the stomata when the guard cells are turgid?
They open
They shrink
They close
They disappear
2
What is the primary function of xylem tissue?
Store food
Transport water and minerals
Produce flowers
Transport sugars
3
How does high humidity affect the rate of transpiration?
Has no effect
Increases it
Decreases it
Stops it completely
4
During which process do plants primarily take in carbon dioxide?
Transpiration
Respiration
Translocation
Photosynthesis
5
How does the leaf facilitate gas exchange?
Through the roots
Via the stomata
By the stem
Through the flowers
6
What is the process of transporting products of photosynthesis through the phloem called?
Transpiration
Translocation
Transfusion
Transmutation
7
Which tissue in the leaf contains chloroplasts?
Palisade mesophyll
Cuticle
Vascular bundles
Epidermis
8
What property of water molecules helps them stick together in the xylem?
Cohesion
Osmosis
Adhesion
Diffusion
9
Which tissue in the leaf is most directly involved in photosynthesis?
Palisade mesophyll
Cuticle
Epidermis
Vascular bundles
10
What is the main function of companion cells in the phloem?
Transport water
Support sieve tubes
Store food
Produce flowers
11
How does wind affect the rate of transpiration?
Decreases it
Has no effect
Stops it completely
Increases it
12
Which part of the leaf is primarily involved in gas exchange?
Stomata
Vascular bundles
Cuticle
Epidermis
13
Which gas is released by plants during photosynthesis?
Carbon dioxide
Methane
Oxygen
Nitrogen
14
Which environmental factor is likely to increase transpiration the most?
High temperature
Low wind
High humidity
Low light
15
What is the main product of photosynthesis transported by the phloem?
Glucose
Minerals
Oxygen
Water
16
Which of the following is a component of phloem tissue?
Sieve tubes
Tracheids
Vessel elements
Guard cells
17
Which factor does NOT influence the rate of transpiration?
Light
Temperature
Wind
Soil type
18
What is root pressure?
The force exerted by roots to absorb nutrients
The pressure of soil on roots
The upward push of water in the xylem
The downward pull of gravity on water
19
Which process is primarily responsible for pulling water up through the xylem?
Respiration
Translocation
Photosynthesis
Transpiration
20
What is the role of the cuticle in leaves?
Absorb sunlight
Facilitate gas exchange
Protect against water loss
Transport nutrients
21
What is the primary function of stomata in leaves?
Absorb sunlight
Control the movement of gases
Produce chlorophyll
Store water
22
What drives the movement of water through the xylem?
Root pressure
All of the above
Transpiration stream
Cohesion of water molecules
23
Which gases are primarily controlled by the stomata?
Hydrogen and oxygen
Nitrogen and oxygen
Carbon dioxide and methane
Oxygen and carbon dioxide
24
Which cells assist in the functioning of sieve tubes in the phloem?
Tracheids
Guard cells
Vessel elements
Companion cells
25
What is the main function of the spongy mesophyll in leaves?
Protect the leaf
Facilitate gas exchange
Transport water
Store nutrients
26
How do guard cells regulate the opening and closing of stomata?
By absorbing sunlight
By storing water
By changing their shape
By producing chlorophyll
