1. Algae are mainly __________ organisms.
2. The plant body of algae is called a __________.
3. Most algae are found in __________ habitats.
4. Volvox is a __________ alga.
5. Ulothrix is a __________ alga.
6. Vegetative reproduction in algae commonly occurs by __________.
7. Asexual reproduction in algae usually takes place through __________.
8. Zoospores are __________ and motile.
9. Fusion of similar gametes is called __________.
10. Fusion of dissimilar gametes is known as __________.
11. Oogamy is seen in __________.
12. About half of the Earth’s carbon dioxide fixation is carried out by __________.
13. Algae increase the amount of dissolved __________ in water.
14. __________ is an edible alga used as food.
15. Algin is obtained from __________ algae.
16. Carrageen is obtained from __________ algae.
17. Agar is obtained from __________ and Gracilaria.
18. __________ is a protein-rich unicellular alga used as a food supplement.
19. Green algae belong to the class __________.
20. The green colour of Chlorophyceae is due to chlorophyll __________ and __________.
21. Storage bodies in green algae are called __________.
22. The cell wall of green algae mainly contains __________ and pectose.
23. Brown algae store food mainly as __________ and laminarin.
24. The brown colour of brown algae is due to the pigment __________.
25. The leaf-like structure in brown algae is called a __________.
26. The stalk-like structure in brown algae is known as __________.
27. Red colour in red algae is due to __________.
28. Food in red algae is stored as __________ starch.
29. Flagella are absent in members of class __________.
30. Red algae belong to the class __________.
Short QAs
1. What is the plant body of algae called?
2. Where are most algae found?
3. Name a colonial alga.
4. Name a filamentous alga.
5. How does vegetative reproduction occur in algae?
6. What are zoospores?
7. What is isogamy?
8. What is anisogamy?
9. What is oogamy?
10. Which alga shows oogamy?
11. Why are algae important ecologically?
12. Which edible alga is commonly used as food?
13. From which algae is algin obtained?
14. From which algae is carrageen obtained?
15. Name the algae used for agar production.
16. Which unicellular alga is used as a food supplement?
17. Which pigments are present in green algae?
18. What are pyrenoids?
19. What is the reserve food material in brown algae?
20. Which pigment gives brown algae their colour?
21. What is the leaf-like structure of brown algae called?
22. What is the stalk-like structure of brown algae called?
23. Which pigment gives red algae their red colour?
24. What is the reserve food material in red algae?
25. In which class are flagella completely absent?
1. Algae are mainly:
A. Heterotrophic B. Saprophytic C. Autotrophic D. Parasitic
2. The body of algae is called:
A. Mycelium B. Thallus C. Rhizome D. Sporophyte
3. Most algae are found in:
A. Desert B. Aquatic habitats C. Mountain regions D. Dry soil
4. Which of the following is a colonial alga?
A. Spirogyra B. Ulothrix C. Volvox D. Chara
5. Which alga is filamentous?
A. Volvox B. Ulothrix C. Chlamydomonas D. Eudorina
6. Vegetative reproduction in algae commonly occurs by:
A. Budding B. Binary fission C. Fragmentation D. Conjugation
7. Asexual reproduction in algae usually occurs through:
A. Seeds B. Zoospores C. Conidia D. Gemmae
8. Zoospores are:
A. Non-motile B. Flagellated and motile C. Covered with shell D. Multicellular
9. Fusion of similar gametes is called:
A. Oogamy B. Anisogamy C. Isogamy D. Syngamy
10. Isogamous reproduction occurs in:
A. Fucus B. Volvox C. Ulothrix D. Eudorina
11. Fusion of dissimilar gametes is known as:
A. Isogamy B. Oogamy C. Anisogamy D. Fragmentation
12. Oogamy is seen in:
A. Volvox B. Spirogyra C. Ulothrix D. Chara
13. About half of the total carbon dioxide fixation on Earth is carried out by:
A. Fungi B. Bryophytes C. Algae D. Gymnosperms
14. Algae increase the amount of dissolved ______ in water.
A. Nitrogen B. Oxygen C. Carbon dioxide D. Sulphur
15. Which of the following algae is used as food?
A. Porphyra B. Gelidium C. Ulothrix D. Chara
16. Algin is obtained from:
A. Green algae B. Brown algae C. Red algae D. Blue-green algae
17. Carrageen is obtained from:
A. Green algae B. Brown algae C. Red algae D. Cyanobacteria
18. Agar is obtained from:
A. Gelidium and Gracilaria B. Volvox and Ulothrix C. Fucus and Sargassum D. Chlamydomonas and Spirogyra
19. Which unicellular alga is rich in proteins and used as food supplement?
A. Chlorella B. Volvox C. Polysiphonia D. Dictyota
20. Green algae belong to the class:
A. Rhodophyceae B. Phaeophyceae C. Chlorophyceae D. Cyanophyceae
21. The green colour of Chlorophyceae is due to:
A. Fucoxanthin B. Chlorophyll a and b C. Phycoerythrin D. Carotene only
22. Storage bodies present in chloroplasts of green algae are called:
A. Dictyosomes B. Pyrenoids C. Vacuoles D. Ribosomes
23. The cell wall of green algae mainly consists of:
A. Chitin B. Cellulose and pectose C. Silica D. Lignin
24. Brown algae mainly store food in the form of:
A. Starch B. Floridean starch C. Mannitol and laminarin D. Glycogen
25. The brown colour of brown algae is due to:
A. Chlorophyll b B. Fucoxanthin C. Phycoerythrin D. Xanthophyll only
26. The leaf-like photosynthetic structure in brown algae is called:
A. Holdfast B. Rhizoid C. Frond D. Stipe
27. The stalk-like structure in brown algae is called:
A. Frond B. Stipe C. Holdfast D. Rhizome
28. Red colour in red algae is due to:
A. Fucoxanthin B. Chlorophyll b C. r-phycoerythrin D. Carotene
29. Food in red algae is stored as:
A. Starch B. Laminarin C. Floridean starch D. Glycogen
30. Flagella are absent in:
A. Chlorophyceae B. Phaeophyceae C. Rhodophyceae D. All algae
MCQs.02.01
MCQs.02.01