Q. Distinguish between Benign tumour and Malignant tumour.

Q. Mention any four sexually transmitted diseases.

Q. Explain the transverse section of young anther with a labelled diagram.

Q. Define parthenogenesis.

Q. a) Write the steps involved in multiple ovulation and embryo transfer.
b) Differentiate between out crossing and cross breeding.

Q. Explain brood parasitism and 'sexual deceit' as an interaction of species with an example each.

Q. Why is oxytocin necessary for parturition?

Q. Draw a neat labelled diagram of sectional view of human female reproductive system.

Q. Mention the technique used to separate DNA fragments in rDNA technology.

Q. Name a causative organism of pneumonia.

Q. Papaya plants exhibit xenogamy only. Why?

Q. List any four hormones secreted by placenta.

Q. What are the conclusions drawn by T.H. Morgan from the crossing experiment in Drosophila with respect to linkage?

Q. Mention three types of Innate barriers of defence with an example each.

Q. a) What is endemism?
b) Mention 'The Evil Quartet' of biodiversity loss.

Q. What is biomagnification?

Q. Write a note on single cell protein.

Q. Suggest any three assisted reproductive technologies to overcome infertility.

Q. Draw a neat labelled diagram of a typical biogas plant.

Q. Name asexual reproductive structures in the following organism.
i) Hydra
ii) Chlamydomonas
iii) Penicillium

Q. How does pollination is achieved in vallisneria and sea grasses?

Q. What is detritus?

Q. Name the plant from which cocaine is obtained.

Q. Differentiate between menstrual cycle and oestrus cycle.

Q. Discuss the role of fungi as biofertilizers.

Q. RNA polymerases in eukaryotes show division of labour. Substantiate.

Q. Describe the process of DNA replication with the help of a diagram.

Q. Mention the use of Cyclosporin A.

Q. What is aneuploidy? Write any four symptoms of Down's syndrome.

Q. tRNA is an adaptor molecule. Comment.