Q. Which disease is caused by point mutation?

Q. If corpus luteum becomes inactive, what will be its effect on embryo development? Explain with reason.

Q. Write the steps in specific sequence of recombinant DNA technology. Describe the method of isolation of the genetic material (DNA).

Q. Define Genetically Modified Organism.

Q. Write the difference between chasmogamous and cleistogamous flowers.

Q. What is decomposition? Explain decomposition cycle in a terrestrial ecosystem. Draw its diagrammatic representation.

Q. The egrets always forage close to where the cattle are grazing. What is this interaction? Explain.

Q. Irrigation without proper drainage of water is harmful for the growth of crops. Why?

Q. What do you mean by fermentors?

Q. Write any two uses of pedigree study in human genetics.

Q. Define Ovulation.

Q. How bacteria, fungi and lower plants survive in unfavourable conditions? Explain.

Q. Which scientist by experimentation demonstrated that "Life comes only from pre-existing life"?

Q. What is genetic engineering? Explain the formation of recombinant D.N.A technique.

Q. In north India which technique is applied for high yield and desirable qualities such as thick stem and high sugar content in sugarcane? Explain.

Q. How can infection caused by pathogens be detected?

Q. Write the name of any one disease in crops caused by fungi.

Q. Write the name of the technique, by which DNA fragments can be separated.

Q. The process of evolution of different species in a geographical area starts from a point and literally radiates to other geographical areas. Explain it with example.

Q. What do you mean by codominance? Explain it with example of blood groups in human beings.

Q. A woman does not want any more pregnancy. Which permanent method will she prefer and why?

Q. Write any four differences between external fertilization and internal fertilization.

Q. What is endosperm? Describe free nuclear endosperm and cellular endosperm.

Q. For biological control which fungus is used in the treatment of plant diseases?

Q. What is nucleosome? Explain the packaging of DNA helix. Draw the labelled diagram of nucleosome.

Q. Write any four salient features of the Double helix structure of DNA.

Q. The nodules on the roots of leguminous plant are destroyed. How will it affect the plant? Explain with reason.

Q. Why should lead free petrol or diesel be used in automobiles?

Q. "The accelerated rate of species extinction is due to human activities." Explain the statement with reasons.

Q. Which technique is used for the correction of diagnosed gene defects in a child / embryo? Explain with example.