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IB Biology Plant Science 9.1 Transport in the xylem and 9.2 Transport in the phloem Flashcards | StudBud
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IB Biology Plant Science 9.1 Transport in the xylem and 9.2 Transport in the phloem
IB Biology Plant Science 9.1 Transport in the xylem and 9.2 Transport in the phloem
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1
Which pair of lines label similar tissues in these cross-sections through a stem and a root.
P and T
R and V
Q and U
S and W
2
The increase in hydrostatic pressure forcing the phloem sap to move towards areas of lower pressure is know as ________.
scarpa flow
transpiration
weight flow
mass flow
3
Identify the process that is used to load organic compounts into phloem sive tubes at the source
exocytosis
active transport
osmosis
diffusion
4
Which is not a component of phloem?
Companion tubes
Sieve tube
Xylem
Sieve plate
5
The active transport of solutes (such as sucrose) into the phloem by companion cells makes the sap solution
___________.
hypertonic
hypotonic
isotonic
gin & tonic
6
True or False: Hydrostatic pressure makes liquids move from low to high pressure
False
True
7
Which is
not
an adaptation of xerophytes?
stems contain water storage tissue
stomata open in the night
stomata open in the day
leaves consist of spines
8
What vascular tissue transports water in plants?
shoot
phloem
root
xylem
9
What is another function of xylem tissue?
storing the products of photosynthesis
doing photosynthesis
transporting the products of photosynthesis
supporting the plant
10
Which of the following substances does phloem mainly transport?
water
mineral salts
sucrose
glucose
11
What is an inevitable consequence of gas exchange in the leaf?
loss of phloem
gain of water vapour
loss of xylem
loss of water vapour
12
What does the phloem do?
move sugars from the source to the sink
move sugars from the sink to the source
move water from the roots to other areas in the plant
gas exchange
13
Where does the exchange of oxygen and carbon dioxide occur in plants?
in the shoot
in the leaves
in the root
in the stem
14
What do these guard cells surround?
potato
stigmata
tomato
stomata
15
What equipment will measure the rate of transpiration in leafy plants?
potometer
photometer
thermometer
colorimeter
16
What is the name of this water loss in plants?
translocation
inspiration
perspiration
transpiration
17
Which statements are true about sieve tubes?
sieve tubes have larger cavities than xylem vessels
many plasmodesmata exist between sieve elements and companion cells i
supported by companion cells that help loading and unloading
have no nuclei and fewer organelles
18
Transportation in Xylem is bidirectional while phloem is unidirectional.
True
False
19
When will the transpiration rate of a well-watered plant be highest?
on a cool, wet, windy day
on a hot, dry, windy day
on a cool, dry, windy day
on a hot, wet, windy day
20
Which graph shows that the rate of transpiration
decreases
as relative humidity increases?
A
C
D
B
21
What cells can control this water loss in leaves?
guard cells
upper epidermal cells
palisade mesophyll cells
spongy mesophyll cells
22
The diagram shows a cross-section of a plant stem. Which region carries water up the plant?
B
A
C
D
23
What factor will increase the rate of transpiration?
decreased temperature
decreased wind
increased light intensity
increased humidity
24
What are plants that adapted to saline conditions called?
filicinophytes
bryophytes
halophytes
hydrophytes
25
What woody deposit allows xylem tissue to support the body of a plant?
cellulose
starch
chitin
lignin
26
What factor will decrease the rate of transpiration?
high humidity
high light intensity
high wind
high temperature
27
What are plants which are adapted for dry, arid conditions?
bryophytes
xerophytes
coniferophytes
angiospermophytes
28
Which parts of a plant can be a source
leaves
seeds
roots
fruit
