Biology Question

1. Name the Vegetative propagules in Agave and Bryophyllum. 2. Write the name of the organism that is referred to as "Terror of Bengal". 3. Give one example each of a fungus which reproduces by budding and conidia. 4. Name an organism, where cell division is itself a mode of reproduction. 5. How does Penicillium reproduce asexually? 6. Name an alga that reproduces asexually through zoo spores. Why are these reproductive units called so? 7. Offsprings produced by asexual reproduction are called clones. Justify giving two reasons. 8.Banana crop is produced by farmers without sowing of seeds. Explain how the plant is propagated. 9. Unicellular organisms are immortal whereas multicellular organisms are not. Justify. 10. Mention one similarity and one difference between conidia and zoospores.

1. Plasma membrane is made up of which two components. 2. Why is endocytosis found in animals only? 3. Why were the scientists not able to observe most of the cell organelles before 1940? 4. Why do animal cells not have cell wall? 5. If you are provided with some vegetable to cook, you generally add salt into the vegetables. After adding salt, vegetables release water. Why? 6. Differentiate between diffusion and osmosis. 7. What will happen if red blood cell is kept in concentrated saline solution? 8. Why does the skin of your finger shrink when you wash clothes for a long time? 9. A solution of 3% glucose and 8% glucose are kept in a trough separated by a semi permeable membrane. What will you observe after one hour? 10. A person takes concentrated solution of salt, after sometimes, he starts vomiting. What is the phenomenon responsible for this situation? Explain. 11. If cells of onion peel and RBC are separately kept in hypotonic solution, what will happen to each of them? 12. Rheo

1. What will happen if an animal cell is put into a solution of sugar prepared in water? 2. An egg without shell is placed in concentrated salt solution for 5 minutes. What will be the expected observation? 3. Plasma membrane is a selectively permeable membrane. Comment on the statement. 4. Distinguish between plasma membrane and cell wall. 5. How do amoeba get its food?