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

Mention the three connotations of the theory of special creation.

Give any two reasons why the patent on Basmati should not have gone to an American Company.

Briefly describe industrial Melanism?

Draw a labelled sketch of sparged-stirred tank bioreactor. Write its application.

A farmer harvests his crop and expresses his harvest in three different ways.

1. I have harvested 10 quintals of wheat.
2. I have harvested 10 quintals of wheat today in one acre of land.
3. I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing.

Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.

1. Why do the symptoms of malaria not appear immediately after the entry of sporozoites into the human body, when bitten by female Anopheles? Explain.
2. Give the scientific name of the malarial parasite that causes malignant malaria in humans.

How does a restriction endonuclease help in DNA recombinant technology?

Justify the statement ‘Vegetative reproduction is also a type of asexual reproduction'.

How do snails, seeds, bears, zooplanktons, fungi and bacteria adapt to conditions unfavourable for their survival?

Reproductive and Child Healthcare (RCH) programmes are currently in operation. One of the major tasks of these programmes is to create awareness amongst people about the wide range of reproduction related aspects. As this is important and essential for building a reproductively healthy society.

1. 'Providing sex education in schools is one of the way to meet this goal'. Give four points in support of your opinion regarding this statement.
2. List any two 'indicators' that indicate a reproductively healthy society.