Draw clear and labelled diagrams for the following:

i) Aleurone cells of a cereal with aleurone grains

ii) Diagrammatic representation of secondary growth in a dicot stem of four years.

iii) T.S. of a stem showing heartwood and sapwood

iv) Endosperm with chalazal haustorium

v) Dimorphic tapetum

With the help of a flow chart explain the processes involved in the initiation of flower primordial.

Prepare a detailed account on types of incompatibility, its biological significance and methods to overcome it.

Describe using well labelled diagrams the development of mammalian pancreas.

Vertebrate Eye Field

Write detailed notes of the following:

i) Physiological effects of plant growth regulators

ii) Characteristics determining economic importance of wood

iii) Syngamy and triple fusion

iv) Autochory

Define cleavage in fertilized egg and give its two main characteristic features. Describe the mechanism of cleavage in the fertilized egg.