ISC (Science) ISC Class 12 - CISCE Important Questions for Biology (Theory)

Name a plant which flowers every twelve years.

Name the terminal stage of ageing in the life cycle of plants

Give a reason for the Following:

Pollen grains of wind-pollinated flowers are produced in large quantities.

Answer the following question:

Define Apomixis.

Choose the correct option of the following question:

Type of Interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is:

Give a scientific term for the following:

Entry of pollen tube into an ovule through integuments.

Expand the following abbreviation IW.

State four features of flowers pollinated by insects.

Name the scientists who have contributed to the following:

Discovered double fertilization.

Give four anatomical differences between a dicot leaf and monocot leaf.

Draw a labelled diagram of the T.S. of a mature anther. 

Define:  Actinomorphic symmetry

Define the Polyembryony.

Explain the different types of endosperms in angiosperms. 

What is the significance of the dispersal of seeds? Give any two points.

Discuss the role of cambium in the secondary growth of dicot stems.

Give four adaptations shown by flowers pollinated by wind.

Draw a neat labelled diagram of the vertical section of a monocot leaf.

Give a term for the following:

Fusion of male gamete and secondary nucleus in angiosperms.

Briefly discuss any two methods by which plants avoid self-pollination.