Biology Class XII

Max. Marks : 70

Time allowed : 3 hrs

Question 1. Which of the movable joint makes the hip joint ?

Question 2. Write the full form of tRNA.

Question 3. Mention any two factors by which the environment or the nature checks the pollution size.

Question 4. Give two examples of analogous organs from animals.

Question 5. Mention one difference in the structure of chlorophyll-a and chlorophyll-b.

Question 6. Name the source glands of glucagon and parathormone.

Question 7. Mention one difference between benign tumour and malignant tumour.

Question 8. Name any two structures in our body, which bear ciliated epithilium.

Question 9. A women travels in a crowded compartment along with people suffering from diabetes, influenza and amoebiasis. With which one of these diseases she is most likely to be infected during this journey and why ?

Question 10. Amongst pea tendrils, opuntia spines, lemon thorns and cucurbit tendril, which ones are homologous structures? Give reason.

Question 11. Describe one example of artificial selection.

Question 12. Mention two differences in the vascular bundles of sunflower and maize stems.

Question 13. Give any four examples of human reflexes.

Question 14. How were exact replicas of master plate obtained in Lederberg replica plating experiment?