Plant Growth and Development · Biology · NEET

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F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :...

Given below are some statements about plant growth regulators. A. All GAs are acidic in nature. B. Auxins are antagonists to GAs. C. Zeatin was isolat...

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin

Formation of interfascicular cambium from fully developed parenchyma cells is an example for

Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield?

The phenomenon which is influenced by auxin and also played a major role in its discovery :

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Which of the following statements is not correct ?

Spraying of which of the following phytohormone on juvenile conifers helps hastening the maturity period, that leads early seed production?

Which hormone promotes internode/petiole elongation in deep water rice?

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

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 ...

Phytochrome is a

The Avena curvature is used for bioassay of

Auxin can be bioassayed by

Typical growth curve in plants is

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

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 ...

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

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...

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

Vernalization simulates flowering in

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

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

Root development is promoted by

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

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

Photoperiodism was first characterised in

Phototropic curvature is the result of uneven distribution of

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

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

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

The wavelength of light absorbed by Pr form of phytochrome is

Opening of floral buds into flowers, is a type of

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

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

How does pruning help in making the hedge dense?

An enzyme that can stimulate germination of barley seeds is

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...

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

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

Coconut milk factor is

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

Differentiation of shoot is controlled by

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

Dwarfness can be controlled by treating the plant with

Seed dormancy is due to the

Which hormone breaks dormancy of potato tuber?

Hormone responsible for senescence is

Which of the following prevents the fall of fruits?

Which plant is LDP?

If the apical bud has been removed then we observe

Which hormone is responsible for fruit ripening?

By which action a seed coat becomes permeable to water

One of the synthetic auxin is