Which of the following best describes transpiration?

Water vapour loss from the leaves

How does auxin influence cell growth rates?

By changing the pattern of gene expression

Indeterminate because it produces variable numbers of leaves

Which of the following statements about phytochrome is correct?

Pfr inhibits flowering in short day plants

Movement of water in the xylem depends on

transpiration & hydrogen bonding between water molecules

Which of the following about source and sink cells is correct?

sink cells transport organic solutes out of sieve tubes

Which is NOT an application of micropropagation

Producing new cells on a microscope slide

Rolling up a leaf reduces transpiration because

It raises the humidity around the stomata

How do most angiospermatophyta improve sexual reproduction?

By using mutualistic pollinators

Which is the correct order of events in sexual reproduction in flowering plants?

meiosis, pollination, fertilization, seed dispersal

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plant biology quiz

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ib topic 9: plant biology

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Questions 20

Answers

1
Which of the following best describes transpiration?
Water evaporation from the leaves
Water vapour loss from the leaves
Water transport from xylem to leaves
Water movement in the phloem
2
What allows plants to continue producing roots, leaves and stems throughout their lives?
Auxin
Cellulose
Phloem
Meristems
3
Carbohydrates are transported in the phloem as:
Sucrose
Fructose
Glucose
Maltose
4
A xerophyte is type of plant that
possesses modified xylem tissue
has a reduced rate of photosynthesis
is adapted to dry conditions
loses its leaves in winter
5
Which abiotic factors affect transpiration rate in plants?
light, pH & humidity
humidity, temperature & salinity
temperature, humidity & wind
pH, temperature & salinity
6
Which property of water allows transport under tension in xylem vessels?
high latent heat of vaporization
adhesion
high specific heat capacity
cohesion
7
How does auxin influence cell growth rates?
By decreasing cell elongation
By increasing the rate of cell division
By regulating auxin efflux pumps
By changing the pattern of gene expression
8
Phloem transport requires energy provided by cells next to the sieve cells. These are called:
company cells
associated cells
active cells
companion cells
9
Which process happens first during the germination of a starchy seed?
formation of gibberellin
absorption of water
production of amylase
breakdown of starch to monosaccharides
10
Growth in plants is:
Indeterminate because it produces variable numbers of leaves
Determinate because number of leaves is variable
Determinate because a certain number of flowers are formed
Indeterminate because a certain number of roots are formed
11
Which of the following statements about phytochrome is correct?
Pfr inhibits flowering in long day plants
Pfr inhibits flowering in short day plants
Pfr is converted rapidly back to Pr in darkness
There are three forms of phytochrome
12
Movement of water in the xylem depends on
transpiration & active transport
transpiration & hydrogen bonding between water molecules
adhesion and active transport
cohesion & active transport
13
A halophyte is a type of plant that:
has a thick waxy cuticle
has a reduced number of leaves
has a reduced rate of photosynthesis
is adapted to salty conditions
14
Which of the following is NOT normally necessary for seed germination?
light
warmth
oxygen
moisture
15
Which of the following about source and sink cells is correct?
only source cells use active transport
sink cells are only found in roots
only photosynthesizing cells can act as source cells
sink cells transport organic solutes out of sieve tubes
16
Which is NOT an application of micropropagation
Producing virus-free strains of existing plant varieties
Producing new cells on a microscope slide
Propogating of rare plant species
Rapid bulking up of new plant varieties
17
Rolling up a leaf reduces transpiration because
It reduces the surface area of the leaf
It raises the humidity around the stomata
It makes the stomata close up
It reduces the amount of light reaching the leaf
18
Movement of organic compounds in the phloem is called
transpitation
transportation
transpiration
translocation
19
How do most angiospermatophyta improve sexual reproduction?
By flowering during short days
By flowering during long days
By using mutualistic pollinators
By using micropropagation
20
Which is the correct order of events in sexual reproduction in flowering plants?
fertilization, pollination, meiosis, seed dispersal
pollination, meiosis, fertilization, seed dispersal
pollination, seed dispersal, fertilization, meiosis
meiosis, pollination, fertilization, seed dispersal

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