Multiple choice questions:
Plants
This is for review only.
1. A hormone induced dropping of leaves, flowers, fruits or other parts of a plant is:
A. Abscission
B. Petiolaria
C. Assimilation
D.Pollination
2. A seed leaf is a:
A. seed
B. cotyledeon
C. monocot
D. leaf primordia
3. The fusion of a sperm nucleus with the egg nucleus and the fusion of another sperm nucleus with the nuclei of the endosperm is:
A. fertilization
B. pollination
C. transpiration
D. translocation
4. A mature ovary, with or without accessory parts is a:
A. root
B. fruit
C. flower
D. seed
5. Resumption of growth after dispersal, dormancy, or both is called:
A. germination
B. abscission
C. transpiration
D. translocation
6. The enlarged base of one or more carpels is the :
A. ovary
B. fruit
C. stigma
D. style
7. The tissue mass in a plant ovary that develops into a seed is the:
A. ovule
B. pollen
C. petiole
D. stigma
8. Immature or mature, sperm bearing male gametophyte of a Gymnosperm or Angiosperm is a :
A. pollen grain
B. ovule
C. anther
D. stamen
9. Arrival of a pollen grain on the landing platform (Stigma) of a carpel is called:
A. fertilization
B. pollination
C. transpiration
D. translocation
10. A mature ovule with an embryo sporophyte inside and integuments that form a seed coat is a :
A. ovule
B. megaspore
C. seed
D. pollen grain
11. Cells in sacs in the anthers undergo meiosis and cytoplasmic divisions to produce haploid _____________ ,which go on to become pollen grains.
A. megaspores
B. microspores
C. mother cells
D. gerbels
12. The flowers of species that have both male and female parts are called ______________ flowers.
A. complete
B. perfect
C. common
D. real
13. Plants exhibit _____________ when they turn their leaves or stems toward the light.
A. phototropism
B. photoauxin
C. light dependency
D. lightdays
14. What is the name of the blue-green pigment molecule that is one of the "alarm buttons" for some biological clocks in plants?
A. hirudin
B. xanthophyll
C. chlorophyll
D. phytochrome
15. A________________ rhythm is a biological activity that recurs in cycles of 24 hours or so.
A. circadian
B. biological
C. dermatome
D. hourly
16. What plant hormone is redistributed within a plant to cause the bending of plants in response to light?
A. giberrelins
B. auxin
C. photons
D. xanthophylls
17. Generally, gravity-sensing mechanisms are based on _________ which are heavy or dense particles that shift position in response to changes in a cell's orientation in space.
A. statocysts
B. statolyths
C. gravotrips
D. stones
18. Tendrils display ____________ when they shift their direction of growth upon contacting a solid object.
A. phototropism
B. gravitropism
C. touhotropism
D. thigmotropism
19. Generally, gravity-sensing mechanisms are based on
a. phytochrome inactivation
b. statolith movement
c. accumulation of ethylene
d. differential gene expression
20. A perfect flower
a. lacks a stamen
b. lacks a carpel
c. has both male and female reproductive parts
21. Double fertilization occurs only in
a. tissue cultures
b. angiosperms
c. monocots
d. dicots
22. When plants shift their growth in response to contact with an object, they show
a. gravitropism
b. thigmotropism
c. photoperiodism
d. phototropism
23. Which of the following statements about endosperm is not correct?
a. it is formed in the stamens
b. it is triploid
c. it serves as nutrition for the embryo
d. it is present only in angiosperms
24. A poinsettia, which must be guarded from excess light in order to induce flowering, is an example of a
a. day-neutral plant
b. short-day plant
c. long-day plant
25. A(n) ______ is a multiple fruit; it is derived from a number of individual flowers that were grouped close together.
a. apple
b. strawberry
c. pineapple
d. acorn
26. When a plant stops growing under conditions that seem (to us) suitable for growth, we say that it has entered into :
a. senescence
b. dormancy
c. abscission
d. germination
27. Which of the following promotes fruit ripening and abscission?
a. indolacetic acid (IAA)
b. gibberellins
c. ethanol
d. none of the above
28. Phytochrome :
a. is a blue-green plant pigment
b. is interconverted between active and inactive forms by variations in the wavelength of light
c. plays a role in maintaining plant circadian rhythms
d. all of the above
29. Which of the following is not a fruit?
a. banana
b. tomato
c. potato
d. hazelnut
30. What plant pigment is suspected of playing a major role in phototropic bending?
a. phytochrome
b. chlorophyll
c. flavoprotein
d. phycobilin
31. The "foolish seedling" effect results from exposure of a plant to an artificially high level of
a. auxin
b. phytochrome
c. ethylene
d. gibberellin
32. Indolacetic acid (IAA) is a naturally occurring
a. auxin
b. pigment
c. gibberellin
d. cytokinin
33. In ______, a new plant is induced to arise from a parent cell that has not become irreversibly differentiated.
a. parthenogenesis
b. genetic engineering
c. tissue culture propagation
d. sexual reproduction
34. Strawberries can reproduce vegetatively by
a. parthenogenesis
b. runners
c. rhizomes
d. tubers
35. In ______, the embryo absorbs nutrients from the endosperm and stores them in its cotyledons.
a. corn
b. wheat
c. rice
d. cherries
36. A ______ is a localized region of still embryonic cells that retain the potential for division.
a. cotyledon
b. corm
c. meristem
d. bulb
37. When a pollen tube reaches an ovule, it penetrates the embryo sac and delivers
a. a single sperm
b. two sperm
c. the endosperm mother cell
d. an egg
38. Abscisic acid
a. is a type of auxin
b. promotes cell elongation
c. induces bud dormancy
d. causes the foolish seedling effect
39. Cytokinins
a. are responsible for circadian rhythms
b. stimulate cell division
c. are synthesized in leaves and transported to roots
d. are activated by red light
40. Food distributors expose fruit to ethylene in order to
a. retard spoilage
b. kill insects
c. promote ripening
d. prevent seed formation