Name the type of cross that would help to find the genotype of a pea plant bearing violet flowers.

State two postulates of Oparin and Haldane with reference to origin of life.

A herd of cattle is showing reduced fertility and productivity. Provide one reason and one suggestion to overcome this problem.

4.

What are Cry genes ? In which organism are they present ?

An electrostatic precipitator in a thermal power plant is not able to generate high voltage of several thousands. Write the ecological implication because of it.

A pollen grain in angiosperm at the time of dehiscence from an anther could be 2-celled or 3-celled. Explain. How are the cells placed within the pollen grain when shed at a 2-celled stage ?

Differentiate between the genetic codes given below : (a) Unambiguous and Universal (b) Degenerate and Initiator

Mention one application for each of the following : (a) Passive immunization (b) Antihistamine (c) Colostrum (d) Cytokinin-barrier

Name the microbes that help production of the following products commercially : (a) Statin (b) Citric acid (c) Penicillin (d) Butyric acid

List four benefits to human life by eliminating the use of CFCs .