Growth And Responses In Plants Question Preview (ID: 33064)


BIO 2. TEACHERS: click here for quick copy question ID numbers.

A physiological response due to changes in the length of day and night is called
a) photochrome
b) photoperiodism
c) photographia
d) phytochrome

A function of ethylene is to
a) induce dormancy
b) promote stem growth
c) control abscission
d) promote cell division

A function of auxin is to
a) induce dormancy
b) break dormancy
c) prevent growth of lateral buds
d) ripen fruit

Nastic movements differ from tropisms in that
a) tropisms involve growth and unidirectional stimuli
b) nastic movements include a response to gravity
c) tropisms are due to an internal clock
d) nastic movements only occur in the stem

Plants exhibit a 24-hour biological rhythm called
a) rhythm and blues
b) the Calvin cycle
c) biological rhythm
d) circadian rhythm

Positive phototropism in stems is due to
a) receptors in the stem
b) movement of auxin to the shady side of the stem
c) differential growth of the stem
d) all are correct

The sensors in root cap cells are called
a) lithographs
b) statoliths
c) calculi
d) graviliths

Stems demonstrate
a) negative gravitropism
b) negative phototropism
c) positive gravitropism
d) none are correct

Growth in response to a solid object is called
a) phototropism
b) gravitropism
c) thigmotropism
d) nastic movement

If a short-day plant's critical period is 9 hours then it will flower if the length of day is
a) 9.5 hours
b) 10 hours
c) 8 hours
d) none are correct

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