Plant Kingdom — BIOLOGY STD 11 Science — Question

What is Rh incompatibility of mother and foetus? What are the complications and necessary precautions involved in this case?

Explain the guidelines/ principles for nomenclature.

Amrita while playing with her friend, near the pond noticed in the pond that a green colour covering is floating on the surface of the water. She discussed this with her friend and both got surprised. Next day in the school Amrita asked her teacher about the same. Teacher told her, that was nothing, but green algae which occur both in fresh and marine water habitats.

1. Mention the economic importance of algae.
2. Why green algae are considered to be the ancestors of all land plants. Justify the statement by giving reasons.
3. What values as a good biology student are reflected from Amrita's character.

How does the process of vernalisation vary among different food crop varities?

What is the significance of meiosis?

Describe the cell structure of fungus in detail.

During resting potential, the axonal membrane is polarised, indicate the movement of +ve and –ve ions leading to polarisation diagrammatically.

Explain the following terms in relation to Phycomycetes.

1. Myceliu.
2. Eucarpy and holocarpy.
3. Asexual reproduction.

List the main features of class Reptilia.