A homogamous tall pistillate plant (TT) is crossed with homogamous dwarf staminate plant (tt). What is the genotype of endosperm?

(a) TTT                  (b) TTt                  (c) Ttt                             (d) ttt

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For artificial hybridisation experiment in bisexual flower, which of the sequences is correct?
(a) Bagging → Emasculation → Cross pollination → Rebagging
(b) Emasculation → Bagging → Cross pollination → Rebagging
(c) Cross pollination → Bagging → Emasculation → Rebagging
(d) Self-pollination → Bagging → Emasculation → Rebagging

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Which of the following is false?

  1. Endosperm formation starts prior to first division of zygote
  2. Angiospermic endosperm is mostly 3N while gymnospermic one is N.
  3. The most common type of endosperm is nuclear.
  4. Coconut has both liquid nuclear (multinucleate) and cellular endosperm.
  5. Milky water of green tender coconut is liquid female gametophyte.

(a) I and II only    (b) III only            (c) V only              (d) II only

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Diagram given below shows stages in embryogenesis in a typical dicot (Capsella). Identify structures A to D respectively:



(a) Suspensor, Radicle, Plumule, Cotyledons
(b) Hypophysis, Radicle, Plumule, Cotyledons
(c) Suspensor, Plumule, Radicle, Cotyledons
(d) Suspensor, Radicule, Plumule, Hypocotyls

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Go through the given diagram of a typical dicot embryo. In which of the following all the 3 parts labelled as A, B, C with their respective functions are correctly identified?

 

A

B

C

(a)

Plumule, shoot system formation

Radicle, root system formation

Hypophysis, formation of radicle

(b)

Plumule, shoot system formation

Radicle, root system formation

Cotyledon, food storage

(c)

Radicle, root system formation

Plumule, shoot system formation

Cotyledon, food storage

(d)

Radicle, root system formation

Plumule, shoot system formation

Endsperm, food storage

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I. No endosperm
II. Endosperm present
III. Cotyledons - thin
IV. Cotyledons – thick
VI. Food is stored in cotyledons
VI. Food is stored in endosperms
Sort out correct points (from I to VI) for (A) - Albuminous and (B) - Exalbuminous seeds:
          A                B                       A                  B
(a) II, III, VI    I, IV, V           (b) I, IV, V         II, III, VI
(c) I, III, V      II, IV, VI         (d) II, IV, VI       I, III, V

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Aleurone layer takes part in:

(a) Protection of delicate embryo        (b) Enzyme synthesis

(c) Transfer of food to cotyledons       (d) Is also called scutellum

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Which are the external conditions required for seed germination:
(a) Oxygen, carbon dioxide and suitable temperature
(b) Oxygen, light and suitable temperature
(c) Light, moisture and suitable temperature
(d) Oxygen, moisture and suitable temperature

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Which of the following is not correct?
(a) As the seed matures, its water content is reduced and seeds become relatively dry(10-15% moisture by mass)
(b) The seed dormancy is the internal or innate inhibition of generation of normal or viable seeds
(c) Embryo in dormant seed shows higher rate of general metabolic rate
(d) Because of dormancy seeds remain viable for longer period and can be stored

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Which of the following will lose its economic value if fruits are produced through parthenocarpy:

(a) Citrus              (b) Banana            (c) Grape              (d) Pomegranate

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