HS 210 EXAM WITH 100%
CORRECT SOLUTION
Which of the following is NOT typically found in a micropropagation media? - ANSWER
Perlite
What happens during the pretransplant stage of micropropagation? - ANSWER New
roots form
During which stage of micropropagation are the plantlets cut apart and placed on a
media with a high cytokinin:auxin ratio to encourage the formation of new shoots? -
ANSWER Multiplication
As a person propagating plants at home, why might you want to know if a specific plant
species frequently produced apomictic seed? - ANSWER Apomictic seed will yield
offspring identical to the parent plant.
The type of cell division that occurs in the reproductive parts of the plant and in which
the daughter cells are NOT genetically identical to the parent cell is called: - ANSWER
Meiosis
A flower on a dioecious plant can be? - ANSWER Imperfect and incomplete
Which of the following accurately describes what takes place during double
fertilization? - ANSWER The correct answer is: One male pollen cell fuses with one
female egg cell to form the diploid zygote while another pollen cell fuses with the two
polar nuclei to form the triploid endosperm.
What class of plants does double fertilization occur in? - ANSWER Angiosperms
During double fertilization, when one of the pollen cells fuses with the two polar nuclei,
which of the following is formed? - ANSWER Endosperm
The female reproductive organ of a flower is called: - ANSWER The pistil
If a flower is perfect, it must at least contain which of the following parts? - ANSWER
Pistil and stamen
The male gamete of a plant is the - ANSWER Pollen
After the fertilization, the ovary of the flower becomes the: - ANSWER Fruit
After fertilization, the ovule of the flower becomes the - ANSWER Seed
Which of the following is a common breeding goal for ornamental plants?
, a. Larger flowers
b. Fragrance
c. Non-invasiveness
d. Disease resistance
e. All of the above - ANSWER All of the above
If you wanted to cross two plants with very small flowers that would be difficult to work
with by hand, which of the following techniques might you want to use to make the
cross? - ANSWER Insect pollination
You are working with an invasive, ornamental plant that you are trying to breed to make
sterile (or at least infertile). Which of following techniques would probably be most
helpful in achieving that goal? - ANSWER Wide across
A plant that is the direct result of a controlled cross of two parent plants and that is the
first generation of offspring from that cross is referred to as: - ANSWER F1 Hybrid
What type of seed is pictured above? - ANSWER Type lll
Which of the following methods should be used to break chemical dormancy? - ANSWER
Leaching
Which of the following methods should be used to break physiological deep dormancy?
Check all answers that apply.
Select one:
a. Leaching
b. Warm moist stratification
c. Cool moist stratification Correct
d. Seed coat removal
e. Scarification - ANSWER Cool moist stratification
Which of the following methods typically should be used to break double dormancy?
Check all answers that apply. - ANSWER c. Scarification Correct
d. Cool moist stratification
Seeds with double dormancy often need both a scarification and a stratification
treatment. Which treatment should be performed first? - ANSWER Scarification
Which of the following methods should be used to break epicotyl dormancy? Check all
answers that apply.
CORRECT SOLUTION
Which of the following is NOT typically found in a micropropagation media? - ANSWER
Perlite
What happens during the pretransplant stage of micropropagation? - ANSWER New
roots form
During which stage of micropropagation are the plantlets cut apart and placed on a
media with a high cytokinin:auxin ratio to encourage the formation of new shoots? -
ANSWER Multiplication
As a person propagating plants at home, why might you want to know if a specific plant
species frequently produced apomictic seed? - ANSWER Apomictic seed will yield
offspring identical to the parent plant.
The type of cell division that occurs in the reproductive parts of the plant and in which
the daughter cells are NOT genetically identical to the parent cell is called: - ANSWER
Meiosis
A flower on a dioecious plant can be? - ANSWER Imperfect and incomplete
Which of the following accurately describes what takes place during double
fertilization? - ANSWER The correct answer is: One male pollen cell fuses with one
female egg cell to form the diploid zygote while another pollen cell fuses with the two
polar nuclei to form the triploid endosperm.
What class of plants does double fertilization occur in? - ANSWER Angiosperms
During double fertilization, when one of the pollen cells fuses with the two polar nuclei,
which of the following is formed? - ANSWER Endosperm
The female reproductive organ of a flower is called: - ANSWER The pistil
If a flower is perfect, it must at least contain which of the following parts? - ANSWER
Pistil and stamen
The male gamete of a plant is the - ANSWER Pollen
After the fertilization, the ovary of the flower becomes the: - ANSWER Fruit
After fertilization, the ovule of the flower becomes the - ANSWER Seed
Which of the following is a common breeding goal for ornamental plants?
, a. Larger flowers
b. Fragrance
c. Non-invasiveness
d. Disease resistance
e. All of the above - ANSWER All of the above
If you wanted to cross two plants with very small flowers that would be difficult to work
with by hand, which of the following techniques might you want to use to make the
cross? - ANSWER Insect pollination
You are working with an invasive, ornamental plant that you are trying to breed to make
sterile (or at least infertile). Which of following techniques would probably be most
helpful in achieving that goal? - ANSWER Wide across
A plant that is the direct result of a controlled cross of two parent plants and that is the
first generation of offspring from that cross is referred to as: - ANSWER F1 Hybrid
What type of seed is pictured above? - ANSWER Type lll
Which of the following methods should be used to break chemical dormancy? - ANSWER
Leaching
Which of the following methods should be used to break physiological deep dormancy?
Check all answers that apply.
Select one:
a. Leaching
b. Warm moist stratification
c. Cool moist stratification Correct
d. Seed coat removal
e. Scarification - ANSWER Cool moist stratification
Which of the following methods typically should be used to break double dormancy?
Check all answers that apply. - ANSWER c. Scarification Correct
d. Cool moist stratification
Seeds with double dormancy often need both a scarification and a stratification
treatment. Which treatment should be performed first? - ANSWER Scarification
Which of the following methods should be used to break epicotyl dormancy? Check all
answers that apply.
