quiz chp 3- (sec 5 & 6)

plant's growth response toward or away from a stimulus

• tropism

• touch

• auxin

• dormancy

touch, gravity, and light are three important stimuli that trigger growth responses, or tropisms in plants

• true

• false

when plants respond to gravity

• gravitropism

• thigmotropism

• tropism

• auxin

when plants show a response to touch

• thigmotropism

• gravitropism

• tropism

• long-day plant

produced by a plant, is a chemical that affects how the plant grows and develops

• hormone

• critical night length

• photopreiodism

• auxin

speeds up the rate at which a plants cells grow and controls a plants response to light

• auxin

• hormone

• photoperiodism

• short day plants

the amount of darkness a plant receives determines the time of flowering plants

• true

• false

a plant's response to seasonal changes in the length of night and day

• photoperiodism

• critical night length

• long day plants

• roots

number of hours of darkness that determines wether or not a plant will flower

• critical night length

• short day plants

• long day plants

• auxin

short day plants flower when the nights are longer than a critical length. they bloom in fall or winter

• true

• false