Different Tropic Movements

Q.

What is parthenocarpy? Which plant hormone is responsible for the induction of parthenocarpy?

Q. Coiling of garden pea tendrils around any support is an example of

1. Thigmotaxis
2. Thigmonasty
3. Thermotaxis
4. Thigmotropism

Q. What do phototropism and geotropism enable plants to do?

1. Grow towards needed resources
2. Prevent invasion by insect colonies
3. Defend themselves against herbivores
4. Develop pesticide resistance by exchanging DNA

Q. The flowers of Oxalis open during the day and close at night, such type of movement is

1. Photonasty
2. Nyctinasty
3. Phototactic
4. Seismonastic

Q. Difference between phototropism and heliotropism.Which
​​ of these does sunflower possess?

Q.

The plants of this group are adapted to live partly in water and partly above the substratum and free from water:

1. Xerophytes

2. Helophytes

3. Thallophytes

4. Hydrophytes

Q.

What are facultative sciophytes and heliophytes?

Q.

Is thigmotropism in touch me not plant positive or negative?

Q.

Match the following columns related to tropisms in plants

$\begin{array}{cc}\text{Column-I}& \text{Column-II}\\ \text{A.Phototropism}& \text{1.Response to chemicals}\\ \text{B.Gravitropism}& \text{2.Response to light}\\ \text{C.Thigmotropism}& \text{3.Response to physical contact}\\ \text{D.Chemotropism}& \text{4.Response to gravity}\end{array}$

1. A-1, B - 2, C - 3 , D - 4

2. A - 4 , B - 3 , C - 2 , D - 1

3. A - 2 , B - 4 , C - 1 , D - 3

4. A - 2 , B - 4 , C - 3 , D - 1

Q. A sleep movement in plants is a nastic response, that occurs daily in response to ____.

1. Water
2. Both a) and b)
3. Light
4. Dark

Q.

The opening of floral buds into flowers is a type of:

1. Autonomic movement of growth

2. Autonomic movement of locomotion

3. Autonomic movement of variation

4. Paratonic movement of growth

Q.

Geotropic response is perceived by

1. Mature roots

2. Root hairs

3. Elongating roots

4. Root cap

Q.

Coiling of garden pea tendrils around any support is an example of:

1. Thigmotaxis

2. Thigmonasty

3. Thigmotropism

4. Thermotaxis

Q.

Give one word for the following:

Bending of shoot towards the light.

Q.

Identify the incorrect statements from the following

1. Young stem of vine plant show positive phototropism and positive thigmotropism

2. Sunflower position itself facing the sun is showing positive response to heat generated due to exposure to sunlight

3. Roots show negative thigmotropism and positive hydrotropism

4. Roots show positive chemotropism to some chemical and negative chemotropism to some other chemicals

1. 1 & 2

2. 2 & 3

3. 3 & 4

4. 2 alone

Q. On touching the leaves of Mimosa pudica, drooping down of leaves occur because of

1. Nyctinasty
2. Chemonasty
3. Photonasty
4. Seismonasty

Q. On touching, the leaves of Mimosa pudica droop down because of

1. Nyctinasty
2. Chemonasty
3. Seismonasty
4. Thigmotropism

Q. Touch me not plant shows ----- movement.

1. Seismonastic
2. Hyponastic
3. Epinastic
4. Photonastic

Q. Some flowers (e.g., Oxalis) open in the morning and close during evening.

1. Photonasty
2. Phototropism
3. Phototaxis
4. Nyctinasty

Q. Mimosa pudica shows seismonastic movements.

1. True
2. False

Q. Plant movement in response to diffuse stimulus of light is

1. Photonasty
2. Phototaxis
3. Phototropism
4. Photolysis

Q. Geocarpic fruit is

1. Mango
2. Orange
3. Water melon
4. Pea nut

Q. When the plant Mimosa pudica is touched it begins to fold up and droop. The types of movement it shows are given below. Select the correct option.
(i) Seismonastic movement (ii) Nyctinastic movement
(iii) Thigmonastic movement (iv) Chemonastic movement

1. (i) and (iii)
2. (iii) and (iv)
3. (ii) and (iii)
4. Only (i)

Q.

Opening of floral buds into flowers, is a type of?

1. Autonomic movement of growth

2. Paratonic movement of growth

3. Autonomic movement of variation

4. Autonomic movement of locomotion

Q. Circinate ptyxis present in fern leaves is due to

1. Epinasty
2. Hyponasty
3. Nutation
4. Movement of variation

Q. Tropic movements in response to the stimulus of chemicals is called:

1. Hydrotropism
2. Geotropism
3. Phototropism
4. Chemotropism

Q.

Give one example of each type of plant (organ) showing the following movement :

1. Negatively geotropism
2. Positively hydrotropism
3. Negatively phototropism
4. Chemotropism
5. Thigmotropism

Q.

Differentiate between tropic and nastic movements.

Q. The movement of sunflower in accordance with the path of the sun is due to :
(a) photonasty
(b) phototropism
(c) hydrotropism
(d) chemotropism

Q. State whether the following statements are true or false.
If a plant is laid on its side, cells on the lower side of the stem will respond to gravity and elongate, making the stem turn so that it continues to grow upward.

1. True
2. False