Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई chapter 7 - Chemical Coordination in Plants [Latest edition]

The chemicals that help in control, coordination and growth of plants are known as ______.

______ are responsible for phototropic response of the plants.

True or False.

Auxins regulate cell division and cell differentiation in plants.

True or False.

Auxins speed up the growth of the roots.

True or False.

Abscisic acid promotes plant growth.

Mark the odd one out:

The fruit ripening hormone is ______.

______ is response of plant to light.

Tendrils are positively ______ and they always grow towards the support.

True or False.

Auxins always accumulate on the illuminated portion of the stem and this result in rapid division of cells in the shaded side.

True or False.

Chemotropism is a directional response of plants to a chemical substance.

True or False.

Roots are negatively geotropic and positively hydrotropic.

Stem tendrils are present in:

Tropic movements help the plant to obtain ______.

Why insectivorous plants are called partial heterotrophs?

How does pitcher plant trap insects?

Which hormone is responsible for nastic movements?

How are the tropic movements of plants helpful to the farmers?

______ movements are independent of direction of stimulus.

The non-directional movement in response to light intensity is termed as ______.

______ regulate many functions in plants.

True or False.

Nastic movement is independent to stimuli shown by plants.

True or False.

Dandelion flowers are sensitive to light.

True or False.

The folding of leaves of Mimosa pudica on touching is a growth movement.

True or False.

Plant hormones are associated with the directional growth movements in plants.

True or False.

Thigmonastic movements are growth movements.

True or False.

Unequal rate of growth in shoots results in bending of shoots towards light.

True or False.

Hydrotropism is movement of the plant in response to gravity.

True or False.

The opening and closing of stomata are not regulated by plant hormones.

True or False.

Closing and opening of flower in response to light intensity is a growth movement.

In tropic movements the plant parts move in response to the direction of the ______.

A plant hormone that is found in higher concentration in ripe banana is ______.

The hormone responsible for apical dominance is ______.

The plant hormone that induces root hair growth is ______.

Non-directional movements in plant parts in response to external stimulus are ______ movements.

The growth of pollen tube towards the ovule is an example of ______ movement.

Match the Following.

Give One Word Answer.

The hormone that promotes the growth of a tendril around a support.

Give One Word Answer.

Hormone that promotes ripening of fruit.

Give One Word Answer.

Hormone used to break seed dormancy.

Name the following:

Growth-retarding hormone in plants.

Name the following:

Hormone that stimulates growth by cell division.

Directional movement of plants in response to external stimuli is called ______.

The reason behind the change in shape of plant cell in response to stimulus is ______.

The hormones which help in the growth of plant stem are ______.

Mark the odd one out:

Closing of Venus fly trap leaf when it captures prey is an example of ______.

Which of the following is not a growthdependent response?

Name one example of the movement of a plant part which is not a growth movement and can be observed easily. Name the plant where this is observed.

What is the stimulus in phototropism?

What is the stimulus in hydrotropism?

What is the stimulus in chemotropism?

How does auxins promote apical dominance?

What is meant by abscission?

Which plant hormone is responsible for abscission?

Distinguish between tropic movements and nastic movements in plants. Give examples to illustrate your answer.

Name the plant part which bends in the direction of gravity but away from light.

Name the plant part which bends towards light but away from the force of gravity.