Which among the following is not a characteristic feature of sporopollenin?

(1) Sporopollenin is one of the most resistant organic material known.

(2) It can withstand high pressures.

(3) No enzyme that degrades sporopollenin is known.

(4) The exine exhibits a fascinating array of patterns and designs.

Megasporangium is equivalent to:

(1) Embryo sac

(2) Ovary

(3) Nucellus

(4) Ovule

The above diagram shows some stages in microgametogenesis. Identify A, Band C:
               A                               B                              C
(1) Symmetric spindle        Generative cell           Vegetative cell

(2) Symmetric spindle        Vegetative cell           Generative cell

(3) Asymmetric spindle       Vegetative cell           Generative cell

(4) Asymmetric spindle       Generative cell           Vegetative cell

Which of the following statements is false?

1. Pollen grains represents male gametophyte
2. In angiosperms partially developed male gametophytes are pollinated
3. Generative cell is siponogenous while vegetative cell is spermatogenous
4. Formation and differentiation of pollen grains is called microsporogenesis
5. Hay fever is a pollen allergy
6. Pollen grains of some plants produce severe allergy and respiratory or bronchial diseases
7. Pollen grains are poor in nutrients.

(a) I and VII          (b) III and VII       (c) IV and V          (d) VI and VII

Self-incompatibility:

(1) All are correct                              

(2) All are wrong

(3) Only I, II, III are correct               

(4) IV and V are wrong

Which of the following is false?

(1) I and II only   

(2) III only           

(3) V only             

(4) II only

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

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

Which are the external conditions required for seed germination:

(1) Oxygen, carbon dioxide and suitable temperature

(2) Oxygen, light and suitable temperature

(3) Light, moisture and suitable temperature

(4) Oxygen, moisture and suitable temperature

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