Plant Physiolog...

Seed germination is the sprouting of a seed due to growth and development of its embryo to form a seedling. Which of the following is a favourable external condition for the germination of a seed?

Which of the following statements is/are false?

a. Vivipary is the germination of a seed while it is attached to the parent plant and is being nourished by it.
b. Geometric growth is a type of growth in which the rate of growth is constant and increase in growth occurs in arithmetic progression.

Which of the following meristems contribute(s) cells for elongation of a plant parallel to its axis?

a. Lateral meristem
b. Root apical meristem
c. Shoot apical meristem

In which of the phases of plant growth, are new cells produced by mitotic divisions of the meristematic tissue and occurs at root apex, shoot apex and other regions having meristematic tissues?

Which of the following is not a mode of measurement of growth of a plant?

Compounds which inhibit the activity of auxin are called antiauxins. Which one of the following is an antiauxin?

Auxins are weakly acidic growth hormones having an unsaturated ring structure. Which of the following is not a function of auxin?

Gibberellins are weak acidic growth hormones having gibbane ring structure. Which of the following is not a use of gibberellins?

Gibberellins are plant growth regulators that cause increased internodal length of genetically dwarf plants. Which one of the following is a characteristic of gibberellins?

Cytokinins are plant growth hormones that promote cytokinesis. Which of the following is not a function of cytokinin?

Consider the following statements and choose the option.

a. Kinetin was the first natural cytokinin that was obtained from unripe maize grains and coconut milk.
b. Gibberellins are synthesised in the apical shoot buds, root tips and developing seeds.

Climacteric fruits are fleshy fruits which show a sudden sharp rise of respiration rate at the time of ripening. Which of the following aids in ripening of climacteric fruits and dehiscence of dry fruits?

Application of minute quantity of which of the following to leaves reduces transpiration to a great extent through partial closure of stomata?

Short-long day plants require short photoperiods for floral initiation and long photoperiods for blossoming and usually come to flower between spring and summer. Which of the following is a short-long day plant?

Seed dormancy is the innate inhibition of germination of a viable seed even placed in most favourable environment for germination. Which of the following is/are methods for artificially breaking of seed dormancy?