PRACTICE QUESTION SET:- GENERAL CHARACTERS OF ALGAE AND ECONOMIC IMPORTANCE

 CHAPTER 3:- KINGDOM PLANTAE

TOPIC GENERAL CHARACTERS OF ALGAE AND ECONOMIC IMPORTANCE

1. What are different types of habitats that are shared by algae?

2. What are the different forms shown by algal plant body?

3. Why we never see epiphytic growth on algae?

4. How algae overcome drying or desiccation?

5. Why there is absence of vascular tissues in algae?

6. Algae do not possess mechanical tissues, why?

7. What are the different types of photosynthetic pigments seen in algae?

8. What are the common methods of reproduction in algae?

9. What are the types of asexual spores produced by algae based on type of division?

10. What is gametangia?

11. What are the common methods of sexual reproduction in algae?

12. What kind of life cycles are shown by algae?

13. Name the algae which are commonly used as food.

14. Which algal members are used as food supplements by space travellers and why?

15. How algae help in respiration to aquatic organisms?

16. Why algae are considered as primary producers of aquatic environment?

17. Name the algae from which agar is obtained?

18. Give different uses of agar.

19. Name the algae from which Algin is obtained commercially,

20. What are the different uses of Algin?

21. Which material is obtained from Chondrus and state its uses.

22. Which algae are used in sewage treatment plant and why?

23. What are the different types of algae on the basis of photosynthetic pigments?

24. How many species of marine algae are used as food?

25. How much CO₂ fixation is carried out by algae?