Sign In

Biology for IGCSE & O level - Transport In Plants (Section 2)

1
What drives the movement of water up the xylem in a plant?
Answer
A
B
C
2
What is the importance of the waxy cuticle on the leaf surface?
Answer
(B)
Preventing water loss
3
What is the role of cohesion in the xylem transport?
Answer
(B)
Water molecules sticking to each other
4
What are the small pores on the leaf surface called?
Answer
(C)
Stomata
5
Which force plays a key role in pulling water up the xylem vessels?
Answer
(C)
Transpiration pull
6
Where are sugars made in a plant?
Answer
(C)
Leaves
7
The process of translocation primarily involves the movement of which substance?
Answer
(C)
Sugars (e.g., sucrose)
8
What process describes the loss of water vapor from plant leaves?
Answer
(C)
Transpiration
9
Which process is primarily responsible for the uptake of water by root hair cells?
Answer
(C)
Osmosis
10
What is the process of water evaporation from a plant's leaves called?
Answer
(C)
Transpiration
11
What is the process of water movement into root hair cells called?
Answer
(B)
Osmosis
12
What is the role of root pressure in water transport?
Answer
(A)
It helps push water up the stem
13
Which of the following is the main sugar transported in the phloem?
Answer
(C)
Sucrose
14
What is the driving force behind the transpiration stream?
Answer
(C)
Evaporation
15
Transpiration is the process of water loss from the leaves of a plant. Through which structures does this water loss primarily occur?
Answer
(C)
Stomata
16
What is the main function of the phloem tissue in a plant?
Answer
(B)
Transporting sugars from leaves to other parts of the plant
17
What is the main purpose of the stomata in the leaves?
Answer
(C)
To control gas exchange and water loss
18
What is the role of the waxy cuticle on the leaf surface?
Answer
(B)
To prevent water loss through transpiration
19
In what direction do sugars move during translocation?
Answer
(B)
From leaves to roots and other parts
20
What structures in the leaf are primarily responsible for regulating transpiration?
Answer
(C)
Stomata and guard cells
21
In the process of translocation, what term is used to describe the region of the plant where sugars are produced?
Answer
(B)
Source
22
What type of cell is found in phloem tissue?
Answer
(B)
Sieve tube elements
23
What happens to the water after it exits the leaves during transpiration?
Answer
(B)
It evaporates into the atmosphere.
24
Which of the following describes the movement of water and dissolved minerals through a plant?
Answer
(B)
From roots to leaves in the xylem
25
What is the primary process by which plants lose water vapor?
Answer
(B)
Transpiration
26
What is the process by which water moves from the soil into the root hair cells?
Answer
(B)
Osmosis
27
How is water transported through the xylem?
Answer
(C)
By the transpiration pull
28
What happens to the rate of transpiration as humidity decreases?
Answer
(A)
Transpiration rate increases
29
What structures control the opening and closing of stomata?
Answer
(A)
Guard cells
30
Which of the following statements best describes the process of transpiration?
Answer
(C)
The loss of water vapor through the stomata of leaves.
31
Which part of the plant is a 'sink' for sugars during translocation?
Answer
(B)
The roots
32
What is the name of the force that helps water move up the xylem due to water molecules sticking to each other?
Answer
(B)
Cohesion
33
Which of the following are functions of xylem and phloem?
Answer
A
B
C
34
What is the process by which water enters root hair cells?
Answer
(B)
Osmosis
35
What is the function of the sieve tube elements in the phloem?
Answer
(B)
Transporting sugars and amino acids
36
What is the role of cohesion in the transport of water in the xylem?
Answer
(B)
Water molecules sticking to each other
37
What is the movement of sugars through a plant called?
Answer
(C)
Translocation
38
What is the role of cohesion in the transpiration stream?
Answer
(A)
Water molecules sticking to each other
39
Which of the following factors can influence the rate of transpiration?
Answer
A
B
C
D
40
What is the primary function of the sieve tube elements in the phloem?
Answer
(B)
Transport of sugars
41
Which of these factors does *not* directly affect the rate of transpiration?
Answer
(D)
Soil pH
42
What is the role of adhesion in water transport in the xylem?
Answer
(B)
Water molecules stick to the walls of the xylem vessels
43
How does the plant minimize water loss during transpiration?
Answer
A
B
D
44
What are the two main components of vascular bundles?
Answer
(B)
Xylem and phloem
45
How does wind speed affect the rate of transpiration?
Answer
(B)
It increases transpiration
46
What is the role of lignin in the xylem vessels?
Answer
A
B
47
What is the function of the stomata's guard cells?
Answer
(B)
To regulate the opening and closing of the stoma
48
What is the main source of water for plants?
Answer
(C)
Soil
49
Which cells regulate the opening and closing of the stomata?
Answer
(C)
Guard cells
50
Which of the following is transported in the phloem?
Answer
(B)
Sugars