Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Write the mode of pollination in Vallisneria and water lily. Explain the mechanism of pollination in Vallisneria.

Describe the experiments that established the identity of 'transforming principles' of Griffith.

Give the name and character of the disease caused by Antamoeba histolytica, Trichophyton and wucheria in human.

Using a Punnett Square, workout the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

Explain aquatic ecosystem by taking example of small pond.

What are the areas which have been responsible for the recent advances in biotechnology?

Selecting the recombinants becomes cumbersome when antibiotic is inactive- explain.###How can we distinguish between recombinant and non recombinant plasmid? Illustrate.

Answer the following questions:
How are pea seeds different from castor seeds with respect to endosperm?

A number of passengers were severely burnt beyond recognition during a train accident. Name and describe a modern technique that can help hand over the dead to their relatives.

OR

Following the collision of two trains a large number of passengers are killed. A majority of them are beyond recognition. Authorities want to hand over the dead to their relatives. Name a modern scientific method and write the procedure that would help in the identification of kinship.

What are sacred groves and their role in biodiversity conservation?