The ability of plants to follow different pathways in response to environment leading to formation of different kinds of structures is called

Which of the following growth regulators is an adenine derivative?

Which one of the following plants does not show plasticity?

The gaseous plant growth regulator is used in plants to:

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yiel...

Plants follow different pathways in response to environment of phases of life to form different kinds of structures. This ability is called

The site of perception of light in plants during photoperiodism is

The plant hormone used to destroy weeds in a field

Which of the following is not an inhibitory substance governing seed dormancy?

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop

What is the site of perception of photoperiod necessary for induction of flowering in plants?

Fruit and leaf drop at early stages can be prevented by the application of

Phytochrome is a

You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the ...

The Avena curvature is used for bioassay of

Auxin can be bioassayed by

What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?

Typical growth curve in plants is

Dr. F. went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of fr...

Which one of the following growth regulators is known as 'stress hormone'?

A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white -coloured like albinos. Which of the ...

The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of

During seed germination its stored food is mobilized by

Through their effects on plant growth regulators, what do the temperature and light control in the plants?

Vernalization simulates flowering in

Which one of the following generally acts as an antagonist to gibberellins?

One of the commonly used plant growth hormone in tea plantations is

Root development is promoted by

Phototropic curvature is the result of uneven distribution of

Photoperiodism was first characterised in

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

Which one of the following acids is a derivative of carotenoids?

Importance of day length in flowering of plants was first shown in

Senescence as an active developmental cellular process in growth and functioning of a flowering plant, is indicated in

The wavelength of light absorbed by Pr form of phytochrome is

Which one of the following pairs, is not correctly matched?

Opening of floral buds into flowers, is a type of

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment c...

An enzyme that can stimulate germination of barley seeds is

How does pruning help in making the hedge dense?

Treatment of seeds at low temperature under moist conditions to break its dormancy is called

The ability of the Venus Flytrap to capture insects is due to

Cell elongation in internodal regions of the green plants takes place due to

One set of the plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by ...

Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone

Differentiation of shoot is controlled by

Nicotiana sylvestris flowers only during long days and N.tabacum flowers only during short days. If raised in the laboratory under different photoperi...

Coconut milk factor is

Seed dormancy is due to the

Dwarfness can be controlled by treating the plant with

Which plant is LDP?

Which of the following prevents the fall of fruits?

Hormone responsible for senescence is

Which hormone breaks dormancy of potato tuber?

If the apical bud has been removed then we observe

By which action a seed coat becomes permeable to water

Which hormone is responsible for fruit ripening?

One of the synthetic auxin is