What process creates low pressures needed for movement of water upwards in xylem?

evaporation of water from mesophyll of leaves

What is the route for water from the soil to the endodermis of roots?

wall of epidermis to wall so cortex to endodermis

How does phytochrome control flowering in plants?

Pr turn into Pfr in the light, causing LDP to flower

Which pair correctly describes how fluids are transported in the xylem and phloem?

xylem away from root only and phloem moves both directions

When a farmer sprays a chemical on crop plants, how does it travel to the roots of the plant?

in the phloem by active translocation

What conditions will cause the highest rate of transpiration in a well-watered plant?

low humidity, hot, bright sunshine and windy

What causes movement of water through the xylem?

evaporation of water from leaves

Which of the following helps in supporting a terrestrial woody plant?

xylem tissue and turgor pressure

Which sequence is correct in the reproduction of a flowering plant?

pollination - fertilization - seed dispersal

Which direction does the phloem transport materials?

up and down the plant all the time

What treatment is most likely to lead to germination?

soaking the seeds in a solution of gibberellins

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Plant Biology - IB Bio HL 2016

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Chapter 9

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Questions 20

Answers

1
What process creates low pressures needed for movement of water upwards in xylem?
evaporation of water from guard cells
active translocation
active transport
evaporation of water from mesophyll of leaves
2
Which plant hormone is responsible for the closing of the stomata?
abscisic acid
gibberellic acid
phytochromes
ethylene
3
What is the route for water from the soil to the endodermis of roots?
wall of epidermis to wall so cortex to endodermis
cytoplasm of root hairs to cytoplasm of cortex to endodermis
wall of root hair cells to cytoplasm of cortex to endodermis
wall of root hair cells to wall of epidermis to endodermis
4
How does phytochrome control flowering in plants?
Pfr turns into Pr in the light, causing SDP to flower
Pr turn into Pfr in the light, causing LDP to flower
Pfr turn into Pr in the dark, causing LDP to flower
Pr turns into Pfr in the dark, causing SDP to flower
5
Which pair correctly describes how fluids are transported in the xylem and phloem?
xylem towards root only and phloem away from root only
xylem away from root only and phloem moves both directions
xylem away from root only and phloem toward root only
phloem toward root only and xylem moves both directions
6
When a farmer sprays a chemical on crop plants, how does it travel to the roots of the plant?
in the xylem by active translocation
in the phloem by transpiration pull
in the xylem by transpiration pull
in the phloem by active translocation
7
What causes stomata to close?
increase in the turgor of the guard cells
the presence of abscisic acid
movement of K+ into the guard cells
a high level of CO2 in the leaf tissue
8
Which of the following are features of dicotyledonous plants?
all of the above
parallel leaf veins and flower parts in groups of three
two seed leaves
flower parts in groups of three and two seed leaves
9
How do mineral ions in the soil move to the root through the soil?
translocation
mass flow of water
through phloem
osmosis
10
Which process if directly assisted by the brightly colored flowers to attract animals?
fertilization
pollination
germination
seed dispersal
11
Which of the following is found on the inner ring of vascular tissue in a dicot?
xylem : mechanical support
phloem : gas exchange
xylem : transport of sugars
phloem : storage of water and starch
12
What conditions will cause the highest rate of transpiration in a well-watered plant?
hot, humid with bright sunshine and still air
windy, hot, cloudy and humid
low humidity, hot, bright sunshine and windy
windy, bright sunshine, humid and cool
13
In flowering plants, which of the following helps seed dispersal?
germination
mammals
bees
pollen
14
What generates new cells in dicotyledonous plants?
lateral meristems
apical meristems
phloem, apical and lateral meristems
apical and lateral meristems
15
Which would be an adaptation of xerophytes?
large numbers of stomata
reduced roots
large air spaces
hairs on the leaves
16
What causes movement of water through the xylem?
gravity
active translocation
active transport in the root tissue
evaporation of water from leaves
17
Which of the following helps in supporting a terrestrial woody plant?
xylem tissue only
turgor pressure and phloem tissue
all of the above
xylem tissue and turgor pressure
18
Which sequence is correct in the reproduction of a flowering plant?
seed dispersal - pollination - fertilization
seed dispersal - fertilization - pollination
pollination - fertilization - seed dispersal
fertilization - pollination - seed dispersal
19
Which direction does the phloem transport materials?
down the plant only
up the plant at night and down the plant during the day
up the plant only
up and down the plant all the time
20
What treatment is most likely to lead to germination?
dehydrating the seeds
soaking the seeds in a solution of gibberellins
increasing light intensity
increasing CO2 concentration

Plant Biology - IB Bio HL 2016 Flashcards | StudBud