Chemotropism

Q.

What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?

Q.

How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

Q.

Define chemotropism. Give one example of chemotropism. State whether this example is of positive chemotropism or negative chemotropism.

Q. Movement due to growth in pea plants?

Q.

The leaves of touch-me-not plant shows chemotropism.

1. True
2. False

Q.

The movement of shoot towards light is:

1. Geotropism

2. Hydrotropism

3. Chemotropism

4. Phototropism

Q.

The movement of plants towards water sources is called ___.

Q. Question 19
The movement of sunflower in accordance with the path of the sun is due to

(a) phototropism
(b) geotropism
(c) chemotropism
(d) hydrotropism

Q.

The top part A of the flask-shaped reproductive organ X in the flower of a plant secretes a surgery substance into its lower part B which goes towards the bottom part C of the flask-shaped organ. When a tiny grain D coming from the top part E of another reproductive organ Y in the flower falls on part A, it grows a long tube F through the organ X in response to the sugary substance and reaches the bottom part C of the flask-shaped organ to carry out fertilisation.

(a) What is (i) organ X, and (ii) organ Y, inside the flower?

(b) Name parts (i) A (ii) B, and (iii) C, of a flask-shaped organ.

(c) Name (i) grain D, and (ii) part E of organ Y.

(d) Name the tube F.

(e) What is the phenomenon of growing a long tube in response to a sugary substance in the process of fertilisation in a flower knows as?

Q.

What is a tropic movement? Explain with an example.

Q. The growth of pollen tube through the style of a flower is an example of ____ tropism.​

1. chemo
2. geo​

Q.

The growth of a pollen tube towards the ovule caused by a sugary substance as a stimulus in an example of :

(a) phototropism

(b) chlorotropism

(c) gravitropism

(d) chemotropism

Q.

Twining tendrils are due to ____.

Q.

Movement of a plant toward water is an example of:

1. Phototropism

2. Geotropism

3. Hydrotropism

4. Haptonastic movement

Q.

Female sex cells is present inside the ___.

Q. Give one example of Chemotropism.

Q. The movement of plants in response to stimuli is known as movement.

1. directional
2. non-directional
3. nastic
4. growth dependent

Q. Movement of plants in response to chemical stimuli is called ____________.

1. phototropism
2. chemotropism
3. hydrotropism
4. geotropism

Q.

Question 18
The growth of pollen tubes towards ovules is due to

(a) hydrotropism
(b) chemotropism
(c) geotropism
(d) phototropism

Q. The growth of a pollen tube towards ovule is caused by _________.

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

Q. Growth of pollen tubes towards ovules is an example of phototropism.

1. True
2. False

Q. The top part $A$ of the flask-shaped reproductive organ $X$ in the flower of a plant secretes a sugary substance into its lower part $B$ which goes towards the bottom part $C$ of the flask-shaped organ. When a tiny grain $D$ coming from the top part $E$ of another reproductive organ $Y$ in the flower falls on part $A$, it grows a long tube $F$ through the organ $X$ in response to the sugary substance and reaches the bottom part $C$ of flask-shaped organ to carry out fertilisation.
$\left(a\right)$ What is $\left(i\right)$ organ $X$, and $\left(ii\right)$ organ $Y$, inside the flower?

Q. Growth of pollen tube through the style towards the embryo sac is an example of

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

Q. Conversion of flowers to fruits is an example of

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

Q. Describe different tropic movement in the plants with examples.

Q. The top part $A$ of the flask-shaped reproductive organ $X$ in the flower of a plant secretes a sugary substance into its lower part $B$ which goes towards the bottom part $C$ of the flask-shaped organ. When a tiny grain $D$ coming from the top part $E$ of another reproductive organ $Y$ in the flower falls on part $A$, it grows a long tube $F$ through the organ $X$ in response to the sugary substance and reaches the bottom part $C$ of flask-shaped organ to carry out fertilisation.
$\left(c\right)$ Name $\left(i\right)$ grain $D$, and $\left(ii\right)$ part $E$ of organ $Y$.

Q.

How chemotropism can be demonstrated?

Q. The growth of pollen tubes towards ovules is due to

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

Q. The movement of pollen tube is called:

1. Chemotropism
2. Thermotaxis
3. Geotropism
4. Hydrotopism