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Plant Propagation Set 2
Test Description: Review questions for plant propagation.
Instructions: Answer all questions to get your test result.
1) Why is a mist of water applied to cuttings at regular intervals between dawn and sunset?
A
to provide plant cells with protection against direct sunlight
B
to create an environment inhospitable to fungi and bacteria
C
to initiate enzyme activity necessary to stimulate root formation
D
to reduce water loss from the plant tissue through transpiration
2) Why should flowers on the stem of a cutting be removed before sticking?
A
to deter potential insect pollinators
B
to stimulate reproductive growth
C
to direct energy to root development
D
to use for ornamental purposes
3) What method of propagation may involve portions of stems, leaves, or roots removed from the plant?
A
budding
B
cuttings
C
layering
D
grafting
4) What is asexual propagation?
A
reproduction through genetic recombination
B
reproduction using vegetative parts of a plant
C
reproduction involving the stigma, ovule, or ovary
D
reproduction through the union of two sex cells
5) Which are the ideal conditions for propagation by cuttings?
A
a dense moist, wet medium; low humidity; shade; bottom heat
B
a loose, moist, highly fertile medium; low humidity; full sun; cool medium
C
a dense, moist, sterile medium; high humidity; full sun; cool medium
D
a loose, moist, sterile medium; high humidity; shade; bottom heat
6) What is an advantage of asexual propagation in the horticulture industry?
A
Outstanding characteristics of plants are assured to be passed on to the offspring.
B
The offspring produced are more likely to be resistant to disease and insect pests.
C
Plants produced benefit from genetic contributions from both of the parent plants.
D
Only a single fertilization is required rather than the normal double fertilization.
7) What term describes the practice of placing cuttings into a medium?
A
budding
B
sticking
C
sowing
D
grafting
8) Why should healthy leaves that have just reached maturity be used for leaf cuttings?
A
They are generally the largest, most attractive, and blemish-free.
B
They have immature root buds that develop once leaves are removed.
C
They have superior heterozygote advantage than less healthy leaves.
D
They have the highest food production and the capacity to produce new plantlets.
9) Which of the following types of stem cuttings is taken from evergreens and deciduous plants during the winter when the plants are in the dormant stage?
A
herbaceous cuttings
B
softwood cuttings
C
semi-hardwood cuttings
D
hardwood cuttings
10) Which of the following types of cuttings can be expected to take the longest to develop roots?
A
hardwood cuttings
B
leaf cuttings
C
root cuttings
D
softwood cuttings
11) What type of roots arise from any plant part other than the seedling roots or their branches?
A
fleshy roots
B
adventitious roots
C
secondary roots
D
napiform roots
12) Why would a plant propagator choose to use the layering technique to propagate a plant?
A
The parent plant supports the new plant during root development.
B
Occasionally new cultivars with improved genetics are discovered.
C
Layering can be conducted anywhere; especially in greenhouses.
D
The technique results in far more offspring than other techniques.
*select an answer for all questions
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