Q. Define the following terms.
(i) Racemose inflorescence.
(ii) Osmotic pressure.

Q. Explain how insulin can be produced using recombinant DNA technology.

Q. Persons suffering from sickle cell anaemia are at an advantage in Malaria infected area. Explain.

Q. Give a scientific term for each of the following.
(i)The first formed category of photosynthetic organisms.
(ii) The surgical removal of a section of fallopian tube.
(iii) An animal behaviour which benefits others but is of no advantage to itself.
(iv) The hydrostatic pressure developed inside the cell on the cell wall due to endosmosis.

Q. Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.

Q. What is heterosis?

Q. Define the term water potential. What are its components? Explain.

Q. Write a brief note on the causes of infertility.

Q. Give any two features of genetic code.

Q. Expand the following abbreviations.
i) STD
ii) NADP
iii) MRI
iv) DDT

Q. Give any three characters that have developed during human evolution.

Q. Briefly describe the technique employed in DNA fingerprinting.

Q. Describe the mass flow hypothesis for translocation of organic solutes(food) in plants.

Q. Why is non-cyclic photo phosphorylation considered as a non-cyclic pathway?

Q. An EEG represents spontaneous electrical activity of the

1. Kidney
2. Spinal cord
3. Heart
4. Brain

Q. Explain the term chemogeny.

Q. Name the scientists who are associated with the following.
(i) Discovered the fossil or Australopithecus.
(ii) Microspheres
(iii) Coined the term Diffusion Pressure Deficit
(iv) Invented the CT scan.

Q. Give four adaptations in flowers pollinated by insects.

Q. Give any four reasons for Mendal's success.

Q. Give four points of anatomical differences between a monocot stem and a dicot stem.

Q. What are introns?

Q. The genotype of a person with Turner's syndrome will be

1. $44A+$XXY
2. $44A+$XXYY
3. $44A+$XYY
4. $44A+$XO

Q. Explain the mechanism of action of T cells to antigens.

Q. Give definition and importance of (i) Imbibition. (ii) Parturition.

Q. Give any two distinctive features of Dryopithecus.

Q. Triple fusion involves

1. Fusion of one male gamete with female gamete
2. Fusion of tube nucleus with generative nucleus
3. Fusion of two polar nuclei
4. Fusion of second male gamete with two polar nuclei

Q. Define the term gene flow.

Q. Transcription is the transfer of genetic code from a DNA molecule to

1. Second DNA molecule
2. Ribosomal sub unit
3. RNA molecule
4. Sequence of amino acids in a protein molecule

Q. Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.

Q. Give two chromosomal similarities between man and apes.