Exam 3 review - Part 2

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

1. tall and spindly seedlings in density planting

2. seed germination in light sensitive seeds

3. 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?

1. lack of water

2. soil composition

3. 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