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Plant Kingdom

Algae: Classification and Characteristics Practice Questions

20 free Algae: Classification and Characteristics practice questions for the NCERT Biology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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All Algae: Classification and Characteristics questions

20 questions
  1. Q1. Which of the following is a colonial form of algae?
  2. Q2. The cell wall of Phaeophyceae (brown algae) is typically covered on the outside by a gelatinous coating of:
  3. Q3. In which class of algae is the food stored as a complex carbohydrate called floridean starch?
  4. Q4. Pyrenoids, which are found in the chloroplasts of most green algae, contain:
  5. Q5. Which of the following algae produces large amounts of carrageen, a hydrocolloid used commercially?
  6. Q6. Isogamous reproduction with non-flagellated (non-motile) gametes is found in:
  7. Q7. Which group of algae is characterized by having two unequal, laterally attached flagella?
  8. Q8. The plant body of a typical brown alga consists of a holdfast, a stalk called the ______ and a leaf-like photosynthetic organ called the ______.
  9. Q9. Agar-agar, used in labs to grow microbes and in ice creams, is obtained from which two genera?
  10. Q10. What is the reason for the red color of Rhodophyceae?
  11. Q11. In Chlorophyceae, the major pigments are:
  12. Q12. Which type of life cycle is generally observed in most algae like Volvox and Spirogyra?
  13. Q13. Ectocarpus and Kelps are examples of which class of algae?
  14. Q14. Flagella are completely absent in both vegetative and reproductive stages of:
  15. Q15. A unicellular alga rich in proteins and used as a food supplement by space travelers is:
  16. Q16. The variation in size and form of brown algae ranges from simple branched filamentous forms to massive bodies called:
  17. Q17. Mannitol and Laminarin are stored food materials in which group?
  18. Q18. Sexual reproduction where a small, motile male gamete fuses with a large, non-motile female gamete is called:
  19. Q19. Which alga exhibits a diplontic life cycle, serving as an exception to the general rule in its group?
  20. Q20. The inner and outer layers of the cell wall in Chlorophyceae are composed of ______ and ______ respectively.