Studied by 4 people
plant science this is e4 only, e3 is in part 1
what is one thing that is not considered plant growth
cell differentiation
the irreversible increase in size or volume
plant growth
Can growth occur during development
a. growth only happens during vegetative phse
b. no
c. yes
c. yes
which of these is NOT affected by the angle of incidence of a beam of light
a. the angle of branch
b. vegetative growth
c. the amount of light absorbed by leaf
d. the color of light shining on leaf
c. vegetative growth
what aspect of light do growers change to have poinsettias flower uniformly at the same time
duration
what is NOT a pigment system in plants
a. kodachrome
b. phototropin
c. phytochrome
d. cryptochrome
a. kodachrome
duration of light that determines when a photoperiodic plant will show a response
critical day length
The movement of leaves or other plant parts to maximize or reduce exposure to sunlight is called…
heliotropic movements
which is true
a. long day plants flower when days are longer than 12 hours
b. short day plants flower when days are shorter than 12 hours
c. day-neutral plants flower regardless of the day length
d. all of these are true
c. day neutral plants flower regardless of the day length
Bud dormancy, leaf fall, and acquisition of freeze tolerance are all processes of what?
a. summer syndrome
b. short day syndrome
c. spring syndrome
d. autumn syndrome
d. autumn syndrome
which of the following characteristics of light affect plant growth and development
a. all of these
b. duration
c. intensity
d. quality
a. all
name two photomorphogenesis responses
tall and spindly seedlings in density planting
seed germination in light sensitive seeds
photoperiodism
a combination of processes that controls the shape or form of the plant
photomorphogenesis
which of the following process may be induced by low temperatures
a. acquisition of freeze toelrance
b. breaking bud dormacy
c. flowering
d. all
all
what happens to cells after the first killing frost
a. all of these happen
b. water flows out of the protoplasm
c. the cells become desiccated and die
d. ice cells rupture cell walls and cell membranes
a. all
these are three potential reasons for delay in what?
lack of water
soil composition
planting to deep
seed germination
why is it important to have early vigorous vegetative growth when growing crops because..
a. the plant will be able to absorb more water and nutrients
b. a plant with a bigger leaf area will be better able to support other plants
c, there will be a greater amount of shoot harvested
d all of these
d. all
which of the following is a characteristic of indeterminate tomato plants
a. it flowers on axillary buds
b. the shoot grows until plant senescence
c. it has a long harvest time
d. all
all
name two things that can cause a reduction in fruit setting
extreme temperatures, drought conditions
changes occur in the ovary in preparation for the development of the fruit
fruit setting
The process in which plants are subjected to a cold period to induce flower initiation and development
vernalization
the process in which imbibed seeds are subjected to cold temps to overcome seed dormacy
stratification
what may cause induction of flowering in plants (3)
cold temp, heat accumulation, photoperiod
True or False:
water makes up a small part of the plant structure
false
reproductive maturity of a plant is reached when the plant
begins to produce flowers
the term vegetative growth refers to growth in which parts of the plant
roots, stems, and leaves
transition from juvenile to maturity
phase change
pollen will not germinate on stigma
incompatibility
union of male and female gametes to form a zygote
fertilization
vegetative growth of axillary buds below aborted flower apex
bypass growth
which of the following is a characteristics of climacteric fruit
a. it can ripen after picking
b. there is a sudden increase in respiration at ripening
c. high levels of ethylene are released
d. all
all
which of these changes occur during senescence in plants
a. change in the structure of the chloroplast
b. decline in photosynthesis
c. transfer of stored nutrients to flowers, seeds and fruits
d. all
all
what is a visible sign that a plant or plant part is undergoing senescnece
the leaves start to change color and then fall off in deciduous plants
cutting off old flowers to prolong flowering
deadheading
which of the following statements is NOT true about plant hormones
a. they are synthesized by the plant
b. they are usually present in very small quantities
c. they are usually affect a part of the plant that is different from where they are produced
d. they are all in liquid form
they are all in liquid form
which plant hormone cause’s bolting in biennials
gibberellic acid
which plant hormone induces flowering in bromeliads such as pineaple
ethylene
which plant hormone is a gas
ethylene
which plant hormone causes the stomates to close during drought conditions
abscisic acid
which plant hormone initiates adventitious root formation and is used commercially as a rooting hormone
auxin
growth hormone
auxin
regulator of cell division
cytokinin
regular of plant height
gibberellic acid
stress hormone
abscisic acid
ripening hormone
ethylene
Note
Flashcard