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Multiple Choice Quiz
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1

In order for pollination to occur the pollen must be placed on the carpel of the flower.
A)true
B)false
2

A seed is a dormant embryo waiting for water to stimulate germination.
A)true
B)false
3

Seeds are not damaged by passage through the digestive system of animals.
A)true
B)false
4

Auxin promotes growth in plants by
A)increasing the plasticity of plant cell walls.
B)stimulating the uptake of water by seeds.
C)causing elongation of stems.
D)increasing the rate of photosynthesis.
E)promoting root tip growth.
5

Plants synthesize auxin from the amino acid
A)cystine.
B)phenylalanine.
C)ornithine.
D)tryptophan.
E)lysine.
6

To brighten her home in the winter a woman decides to force an iris to bloom. To achieve this she should
A)expose the plant to long periods of darkness.
B)expose the plant to short periods of darkness.
C)interrupt a long period of darkness with a flash of light.
D)water it generously.
E)both b and c
7

Many plants have seeds that are stimulated to germinate by
A)exposure to fire.
B)exposure to red light.
C)stimulation by auxin.
D)exposure to ethylene.
E)insect pollinators.
8

In angiosperms male and female reproductive structures usually develop
A)in separate plants.
B)on different flowers on the same plant.
C)in the same flower.
D)at different times so self-fertilization is avoided.
E)at the same time so self-fertilization is ensured.
9

In angiosperms that rely on wind for pollination they must
A)produce copious amounts to ensure pollination occurs.
B)grow close together to ensure pollination.
C)produce a foul odor to discourage insect pollinators.
D)produce a foul odor to discourage bird pollinators.
E)a, b and d are true
10

Insects are encouraged to visit flowers by
A)a food such as nectar.
B)flower colors that stimulate mating in the insects.
C)the protection they provide from predators.
D)a pleasant odor.
E)pheromones.
11

The embryo of a flowering plant is covered by the
A)cuticle.
B)waxy layer.
C)integument.
D)cotyledon.
E)ground meristem.
12

In angiosperms tissue differentiation in the embryo begins
A)when the seed germinates.
B)when the basal cell is stimulated by auxin.
C)after the flower dies.
D)almost immediately after fertilization.
E)after the cotyledons are fully grown.
13

This plant hormone promotes stem elongation and enzyme production in developing seeds.
A)auxin
B)cytokinin
C)ethylene
D)abscisic acid
E)gibberellins
14

This is produced by aging fruit.
A)auxin
B)cytokinin
C)ethylene
D)abscisic acid
E)gibberellins
15

This hormone promotes lateral bud dormancy.
A)auxin
B)cytokinin
C)ethylene
D)abscisic acid
E)gibberellins
16

This plant hormone promotes chloroplast development.
A)auxin
B)cytokinin
C)ethylene
D)abscisic acid
E)gibberellins
17

This plant hormone inhibits the effects of other hormones.
A)auxin
B)cytokinin
C)ethylene
D)abscisic acid
E)gibberellins
18

Cytokinins:
A)This hormone causes leaves to age and fall off of the plant.
B)This hormone would cause the stem to grow towards a source of light.
C)This hormone is produced in the apical portion of stems.
D)Tomatoes are stimulated to ripen when exposed to this hormone.
E)Cell division is stimulated by this hormone.
19

Abscisic acid:
A)This hormone causes leaves to age and fall off of the plant.
B)This hormone would cause the stem to grow towards a source of light.
C)This hormone is produced in the apical portion of stems.
D)Tomatoes are stimulated to ripen when exposed to this hormone.
E)Cell division is stimulated by this hormone.
20

Ethylene:
A)This hormone causes leaves to age and fall off of the plant.
B)This hormone would cause the stem to grow towards a source of light.
C)This hormone is produced in the apical portion of stems.
D)Tomatoes are stimulated to ripen when exposed to this hormone.
E)Cell division is stimulated by this hormone.
21

Gibberellins:
A)This hormone causes leaves to age and fall off of the plant.
B)This hormone would cause the stem to grow towards a source of light.
C)This hormone is produced in the apical portion of stems.
D)Tomatoes are stimulated to ripen when exposed to this hormone.
E)Cell division is stimulated by this hormone.
22

Auxins:
A)This hormone causes leaves to age and fall off of the plant.
B)This hormone would cause the stem to grow towards a source of light.
C)This hormone is produced in the apical portion of stems.
D)Tomatoes are stimulated to ripen when exposed to this hormone.
E)Cell division is stimulated by this hormone.





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