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

Name the special type of tissue enabling plants like lotus and water hyacinth to survive in aquatic environment. Mention any two specific functions of this tissue?

Why has the Indian Parliament cleared the second amendment of the country’s patents bill?

Study the diagram given below:
Name the linkages X, Y, Z and the respective molecules formed by them.

With the help of an example differentiate between incomplete dominance and co-dominance.

What is the significance of ampullary–isthmic junction in the female reproductive tract?

Ignoring our traditional knowledge can we prove costly in the area of biological patenting. Justify.

Differentiate between oviparous and viviparous animals with an example of each.

What is obsessive-compulsive disorder? How is it different from borderline personality disorder? What are the two most common obsessions that affect adolescents?

Study the population growth curves shown above.

1. Identify curves ‘a’ and ‘b’.
2. Mention the responsible for the curves ‘a’ and ‘b’ respectively.
3. Give the necessary equation for the curve ‘b’.

Ankit attended a blood donation camp to donate blood and came to know that he was HIV positive. He lost interest in studies knowing that. He remained absent from school for a long time. The biology teacher visited his house and talked to him. Ankit started coming to school again and showed interest in studies.

1. A person detected to be HIV positive should be isolated by the society. Do you agree? Why/ why not?
2. Write the processes through which, AIDS does not spread.
3. Who are at higher risk of encountering AIDS?
4. What sense of responsibility did the biology teacher exhibit?