Tag: movement in plants

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Multiple choice movement in plants living world of plants - plant physiology biology

In hyponasty, there is increased growth on

  1. Shaded side

  2. Illuminated side

  3. Lower surface

  4. Upper surface
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nastic movements are responses of plant parts to stimuli. Epinasty is the downward bending of a leaf resulting from greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open due to epinasty. The hyponasty is an upward bending of leaves resulting from increased growth on the lower surface.

Thus, the correct answer is option C.

Multiple choice movement in plants living world of plants - plant physiology biology

Sleep movement of Papaya/Balsam is

  1. Autonomic movement

  2. Tropic movement

  3. Movement of locomotion

  4. Growth movement
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tropic movement is growth movement shown by plant in response to a unidirectional external stimulus. Leaves and leaflets shows nyctinastic movement, that is movement in night or in dark. This is also called as sleep movement. In this, the leaves become vertical during night. This is growth movement. Leaf shows daily rhythmic movement due to differential growth of upper and lower halves of the petiole. It is seen in papaya and balsam. 

Thus, the correct answer is option D.

Multiple choice movement in plants living world of plants - plant physiology biology

Movements caused by internal factors are

  1. Paratonic

  2. Intrinsic

  3. Autonomic

  4. Rheotropism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A movement shown by a plant part in response to an external factor is called as paratonic movement. In this, the direction of movement is controlled by the direction of the stimulus. Autonomic movement is the spontaneous movement of the protoplasm seen in aquatic plants due to internal factors. Growth of plant in response to the current of water is called as rheotropism.

Thus, the correct answer is option C.

Multiple choice movement in plants living world of plants - plant physiology biology

Drooping/folding of legume leaves in dark is 

  1. Temporary wilting

  2. Nyctinasty

  3. Seismonasty

  4. Permanent wilting
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nastic movements are responses of plant parts to stimuli. Nyctinasty is the rhythmic nastic movement of plant in response to the onset of darkness. Drooping of legume leaves in dark is due to nyctinasty. Seismonastiy is the nastic response of a plant to touch or vibration. Dropping of leaves of Mimosa pudica upon touching is due to seismonasty. 

Thus, the correct answer is option B.

Multiple choice movement in plants living world of plants - plant physiology biology

Shock movements of leaves of sensitive plant, Mimosa pudica, are

  1. Thermonaty

  2. Seismonasty

  3. Hydrotropism

  4. Chemonasty
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nastic movements are responses of plant parts to stimuli. Thermonasty is the a nastic response of plant in response to change in temperature. Thigmonasty or seismonasty is the nastic response of a plant to touch or vibration. Shock movements of leaves of Mimosa pudica leads to dropping of leaves due to seismonasty. Chemonasty is the nastic response of a plant to external chemical. 

Thus, the correct answer is option B.

Multiple choice movement in plants living world of plants - plant physiology biology

What is the type of movement that occurs during opening and closing of flowers?

  1. Nastic movement

  2. Tactic movement

  3. Tropic movement

  4. Nutation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nastic movements are responses of plant parts to stimuli. Epinasty is the downward bending of a leaf resulting from greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open. The hyponasty is an upward bending or uncoiling of leaves resulting from greater growth of the lower side. Due to more growth on the lower side, the flower will close. Tactic movements are response of plant parts to external stimuli like light, chemicals. Tropic movements are response of plant parts to external stimuli like gravity, light, touch. Nutation is the bending movements shown by some plant parts due to the unequal rate of growth of different parts of plants. 

Thus, the correct answer is option A.

Multiple choice movement in plants living world of plants - plant physiology biology

Circinate ptyxis present in fern leaves is due to

  1. Epinasty

  2. Hyponasty

  3. Nutation

  4. Movement of variation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nastic movements are responses of plant parts to stimuli. Epinasty is the downward bending of a leaf resulting from greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open as a result of epinasty. The hyponasty is an upward bending or uncoiling of leaves resulting from greater growth of the lower side. Circinate ptyxis is found only in fern leaves due to hypoasty. Nutation is the bending movements shown by some plant parts due to the unequal rate of growth of different parts of plants. 

Thus, the correct answer is option B.

Multiple choice movement in plants living world of plants - plant physiology biology

Opening of flower and drooping of a bud are 

  1. Hyponasty

  2. Epinasty

  3. Curvature movement

  4. Spontaneous movements
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nastic movements are responses of plant parts to stimuli. Epinasty is the downward bending or drooping of a bud resulting from greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open as a result of epinasty. The hyponasty is an upward bending or uncoiling of leaves resulting from greater growth of the lower side. 

Thus, the correct answer is option B.

Multiple choice movement in plants living world of plants - plant physiology biology

Movement of plant part in response to touch is

  1. Seismonasty

  2. Thigmonasty

  3. Nutation

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nastic movements are responses of plant parts to stimuli. Seismonastiy is the nastic response of a plant to touch or vibration. Dropping of leaves of Mimosa pudica upon touching is due to seismonasty. Thigmonasty is the nastic response of a plant to touch. The movements of tentacles of Drosera when comes in contact with insect is due to thigmonasty. Nutation is the bending movements shown by some plant parts due to the unequal rate of growth of different parts of plants.  

Thus, the correct answer is option B.

Multiple choice movement in plants living world of plants - plant physiology biology

In hyponasty, the bud will remain

  1. Open

  2. Closed

  3. Semi-open

  4. Wilt
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nastic movements are responses to plant parts to stimuli. Epinasty is the downward bending or drooping of a bud resulting from the greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open as a result of epinasty. The hyponasty is an upward bending or uncoiling of leaves resulting from the greater growth of the lower side. Due to more growth on the lower side, the flower will remain closed as a result of hyponasty.

Thus, the correct answer is option B.