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

Draw a labelled diagram of female reproductive system.

How is Darwin's concept of evolution different from that of de Vries?

OR

How is mutation explained by Hugo de Vries different from the Darwinian variations?

OR

How do Darwin and de Vries differ in their views on the mechanism of evolution of life on earth?

Name four non-human organisms whose genomes have been sequenced.

How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?

Rearrange the human activities mentioned below as per the order in which they developed after the modern Homo sapiens came into existence during ice age:

1. Human settlement.
2. Prehistoric cave art.
3. Agriculture.

How is early detection of infectious diseases possible by molecular diagnosis?

List two essential roles of the ribosome during translation.

Mention the difference between spermiogenesis and spermiation.

In peas, tallness is dominant over dwarfness, and red colour of flowers is dominant over the white colour. When a tall plant bearing red flowers was pollinated by a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny.
Tall, Red = 138
Tall, White = 132
Dwarf, Red = 136
Dwarf, White= 128
Mention the genotypes of the two parents and of the types of four off springs. in numbers mentioned against them.

Do you consider passive smoking is more dangerous than active smoking? Why?