Photosynthetic products are carried

in many directions by the phloem.

stimulates long day plants to flower.

Transpiration of water up the stem of a plant is largely due to

evaporation of water from the leaves.

Because auxin moves to the shady side of the stem, cells on that side

to grow longer causing the stem to bend around short cells.

Active tranport of minerals into the roots increases the solute concentration increasing

the amount of water absorbed through osmosis.

Potassium is moved into the root of plants through

through special potassium channels by active transport.

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IB Biology Plant Review

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Questions 29

Answers

1
Sunlight converts
Pr quickly into Pfr
Pr slowly into Pfr
Pfr slowly into Pr
Pfr quickly into Pr
2
Photosynthetic products are carried
in one direction only by the phloem.
in several directions by the xylem.
in one direction only by the xylem.
in many directions by the phloem.
3
Tubers and bulbs act as sinks in the ______ and sources in the _____.
summer, early spring
winter, summer
spring, autumn
early spring, summer
4
Regulates opening and closing of stoma.
guard cells
Palisade mesophyll
epidermis
cuticle
5
The vessel water column in plants is maintained through
adhesion of water to the vessels.
all of these
cohesion of water to itself.
capillary action of water up the vessels.
6
A plant in a pot falls over and the leaves bend upward away from gravity. This is an example of
negative phototropism
negative geotropism
positive phototropism
positive geotropism
7
Sunlight causes auxin to
bottom of the stem.
move to the sunny side of the stem.
shady side of the stem.
tip of the stem.
8
Guard cells are open when
CO2 is abundant
O2 is abundant
water is scarce
water is abundant
9
Water uptake activates the plant hormone
gibberellin
cotyledon
auxin.
abscisic acid
10
P_fr
stimulates short day plants to flower.
stimulates long day plants to flower.
inhibits long day plants from flowering.
both a and b
11
Gibberellin activates the enzyme
all of these
maltase.
amylase.
abscisic acid
12
Plants with not vascular system and no true roots.
angiospermophyta
bryophyta
filicinophyta
coniferophyta
13
Symplastic water route through the root
travels through intercellular spaces.
travels through the cell walls.
travels through the cells.
travels through the phloem
14
This hormone causes potassium ions to rapidly leave the gurad cell taking water with it.
Auxin
<p>Giberillin</p>
Abscisic acid
all of these
15
Transpiration of water up the stem of a plant is largely due to
active transport of water to the leaves.
precipitation of water in the leaves.
evaporation of water from the leaves.
all of these
16
Waxy covering that prevents water loss in leaves.
Palisade mesophyll
Cuticle
Epidermis
Guard cells
17
Site of gas exchange in the leaf.
Spongy Mesophyll
Pallisade Mesophyll
Phloem
Cambrium
18
Because auxin moves to the shady side of the stem, cells on that side
stop dividing causing the stem to bend
to grow longer causing the stem to bend around short cells.
to rapidly divide causing the stem to grow upright.
to rapidly divide, cells shorten on shady side, stem bends.
19
Contains several chloroplasts and major site of photosynthesis.
epidermis
cambrium
Spongy Mesophyll
Palisade Mesophyll
20
Seed germination is initiated by
long nights.
short nights.
water uptake
long days.
21
Vascular structure that transports water and minerals.
Xylem
Spongy Mesophyll
Phloem
Palisade Mesophyll
22
Active tranport of minerals into the roots increases the solute concentration increasing
the amount of water absorbed through osmosis.
salt absorbed in roots through diffusion.
the loss of water in the roots through osmosis.
salt lost into the soil through active trasnport.
23
Water is gain and loss in the guard cell is due to
transport of potassium ions.
transport of calcium ions.
sunlight.
transport of oxygen.
24
Although photosynthetic products can go many directions, it is based on principle
Principle of bulk flow.
Principle of diminished returns.
Principle of source to sink.
of transpiration.
25
Potassium is moved into the root of plants through
through facilitated diffusion.
through co-transport.
through special potassium channels by active transport.
the lipid bilayer through diffusion.
26
Light causes
increase in the number of auxin efflux pumps.
all of these.
incresed production of auxin.
redistribution of auxin.
27
A plant with fibrous roots, parallel veins and flower petals in multples of 3
is a conifer
is a dicot
is a monocot
is a filicinophyte
28
This is the part of the plant stem that is repsonsible for primary plant growth.
internodes
lateral meristem
nodes
apical meristem
29
Transpiration is increased by
all of these
wind.
light.
temperature.

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