Biology NEET - XI: Chapter 15- Plant Growth and Development

Who developed arc auxanometre?

Which device is used to measure the increase in surface area?

What is the term ‘r’ in the equation of geometric growth?

Which phase represents the phase of adaptation in a sigmoid curve?

Developmental heterophylly is found in

Environmental heterophylly is found in

Who discovered auxin?

In which plant was auxin first discovered?

Who isolated auxin from a plant for the first time?

Auxin was first exctracted from

What is the bioassay of auxins?

What is the natural form of auxin?

Name three synthetic auxin.

Which hormone initiates rooting in stems?

Which hormones promote flowering in pineapples?

Which hormone prevents leaf and fruit drop at early stages but promotes abscission of older leaves, flowers, etc?

Which hormone induces apical dominance?

Which hormone induces parthenocarpy?

Mixture of which hormones is used as a dicot weedicide?

What is the bioassay of gibberellins?

Which hormones induce profuse flowering in plants?

Which hormoes delay senescence?

Which hormones are used to increase the length of the stalk of grape vines?

Which hormones cause fruits like apple to elongate?

Which is the most important gibberellin?

Which hormones are used to increase malting in plants?

Which hormones are extremely useful to the brewing industry?

Which hormones cause bolting?

By how many times do gibberellins increase the yield of sugarcane?

Who discovered cytokinins and in what?

Cytokinins were discovered in which plant for the first time?

What did Miller and Skoog name cytokinins?

What did Letham who discovered cytokinins in maize name it?

What is the bioassay of cytokinins?

Which hormones are known as true cell division factors?

Which hormones help in overcoming apical dominance?

Which hormones are antagonistic to cytokinins?

Give an example of a synthetic cytokinin.

Who confirmed the presence of ethylene hormones in ripened oranges?

What kind of tissues produce ethylene in maximum quantity?

Which hormone promotes root hair formation in plants?

Which hormone is used to initiate fruiting in pineapples?

Which hormone initiates flowering in mangoes?

Which hormone induces formation of female flowers in cucumbers?

Which hormone promotes horizontal growth of seedlings and apical hook formation?

Which hormone promotes rapid petiole elongation in rice?

WHich hormone helps break bud and seed dormancy?

Which hormone initiates germination in peanuts?

Which hormone helps in sprouting of potato tubers?

What is respiratory climactic?

Which is the most common source of ethylene ?

Which hormone is called stress hormone?

Which hormones are antagonistic to gibberellic acid?

What is known as critical day length?

Give examples of short day plants.

Give examples of long day plants.

Give examples of day neutral plants.

When are winter varieties of a plant planted?

When are winter varietes of a plant harvested?

Which hormone substitutes for low temperatures required for vernalisation?

What is the colour of phytochrome red?

What is the colour of phytochrome far red?

Where is phytochrome red located?

Where is phytochrome far red located?

Phytochrome red can be converted into phytochrome far red by

Phytochrome far red can be converted into phytochrome red by

Flowering in short day plants in induced by which phytochrome?

Flowering in long day plants is induced by which phytochrome?

N6-furfurylamino purine is a derivative of

Kinetin is a derivative of

Abscissic acid is a derivative of

Gibberellic acid is a derivative of

Though ethylene can function as both a plant growth promoter and a plant growth inhibitor, it is a largely a

Which hormone helps control xylem differentiation?

Which hormones allow fruits to be left longer on the trees so as to extend its market period?

Which hormone hastens the maturity of juvenile conifers?

Which hormone promotes adventitious root formation?

Which hormone accelerates thinning of cotton, cherry and walnut?

What are the sites of perception of light/dark duration?

Biennials are polycarpic plants that normallly flower and die in the second season. True/false?

Give examples of common biennials?