Part – A: Answer any TEN of the following questions in ONE word or ONE sentence each: 10 x 1 = 10
1. Define herbarium. 2. What is bioluminescence? 3. Give an example for plant having epigynous flower. 4. Name the excretory organ found in cockroach. 5. Who first described nucleus as a cell organelle? 6. A cell is actively synthesising and secreting proteins. Which cell organelle is involved in this? 7. What is symport? 8. Name the element responsible for opening and closing of stomata. 9. Why photorespiration does not occur in C4 plants? 10. Define RQ. 11.Mention the blood group having both types of antigen on RBCs. 12.Name the functional unit of muscle contraction. 13.Why the 11th and 12th pairs of ribs in rib cage are called floating ribs? 14.Write the current scientific definition of hormones. 15.Adrenaline and nor-adrenaline are called emergency hormones. Give reason.
Part – B: Answer any FIVE of the following questions in 3-5 sentences each, wherever applicable: 5 x 2 = 10
16.“Viruses exhibit both living and non-living characters”. Justify the statement. 17.Mention any two commercial products obtained from algae. 18.Differentiate between endarch and exarch xylem. 19.How do co-enzymes differ from prosthetic groups? 20.“The direction of food movement in phloem can be bidirectional”. Substantiate the statement by giving two reasons. 21.Mention the deficiency symptoms of essential elements in plants. 22.Write the steps involved in conversion of ammonia into nitrate by soil bacteria. 23.Mention any two disorders of human respiratory system. 24.Give an example each for ammonotelic and uricotelic animals. 25.Mention the types of synapse.
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