Biodiversity and Conservation — BIOLOGY STD 12 Science — Question

Name the stage ofthe Plasmodium thall is trrnsmitted to human body by the vector. Describe the life cycle of the plrasite in humans.

OR

Trace the life cycle of Plasmodium in humans from the stage of entry, until it is picked up by the female Anopheles.

The diversity of plants and animals is not uniform throughout the world but shows a rather uneven distribution. Explain with example.

What is meant by biological evolution?

How do scientists extrapolate the total number of species on Earth?

Explain the importance of biological production obtained from animal in which foreign gene is introduced.

Draw a labelled diagram of a Graafian follicle?

What does 'Hind' and 'III' refer to in the enzyme Hind III?

Answer the following questions:
How does cleistogamy ensure autogamy?

Community service department of your school plans a visit to a slum area near the school with an objective to educate the slum dwellers with respect to health and hygiene.

1. Why is there a need to organise such visits?
2. Write the steps you will highlight as a member of this department, in your interactions with them to enable them to lead a healthy life.

Explain the Ex-situ conservation.