1. Kelps may reach a height up to
a) 120 m
b) 100 m
c) 1000 m
d) 10 m
Explanation: Kelps may reach a height up to 100 m.
2. The algae which possess chlorophyll a, c, carotenoids and xanthophylls belong to
a) Green algae
b) Brown algae
c) Both (a) and (b)
d) None of these
Explanation: Brown algae
3. Brown algae vary in colour from _______ to various shades of _______ depending on the
amount of _______ pigment and _______ present in them
a) fucoxanthin, xanthophyll, blue, brown
b) blue, brown, fucoxanthin, xanthophyll
c) yellow, brown, fucoxanthin, xanthophyll
d) olive green, brown, fucoxanthin, xanthophyll
Explanation: Brown algae vary in colour from olive green to various shades of brown depending on the amount of fucoxanthin pigment and xanthophyll present in them
4. Laminaria and mannitol are stored foods of
a) Euglena
b) Green algae
c) Liverworts
d) Brown algae
Explanation: Laminaria and mannitol are stored foods of brown algae.
5. The plant body of algae is divided in holdfast, stipe and fronds in
a) Chara
b) Laminaria
c) Porphyra
d) All of these
Explanation: Laminaria
6. The plant body attached to substratum in brown algae is by
a) Rhizoids
b) Multicellular hair
c) Holdfast
d) Roots
Explanation: The plant body attached to substratum in brown algae is by holdfast.
7. The photosynthetic leaf like organ found in some of the algae are called
a) Sporophyll
b) Fronds
c) Leaves
d) Scaly leaves
Explanation: The photosynthetic leaf like organ found in some of the algae are called Fronds.
8. Zoospores of brown algae are
a) Uniflagellate
b) Multiflagellate
c) Biflagellate
d) May be any of the above three
Explanation: Zoospores of brown algae are Biflagellate.
9. The arrangement of flagella in brown algae is
a) One and equally arranged
b) Two unequal and laterally arranged
c) Many flagella arranged anywhere on the body
d) Depends from organism to organism
Explanation: Two unequal and laterally arranged
10. The biflagellate pear-shaped zoospores are characteristics of
a) Red algae
b) Green algae
c) Brown algae
d) All of these
Explanation: The biflagellate pear-shaped zoospores are characteristics of brown algae.
11. Fertilization in brown algae occurs in
a) Water
b) Within the oogonia
c) Both (a) and (b)
d) None of these
Explanation: Both (a) and (b)
12. Sexual reproduction shown by members of brown algae is
a) Isogamous
b) Anisogamous
c) Oogamous
d) All of these
Explanation: All of these
13. Pyriform gametes means
a) Pea-shaped gametes
b) Pear shaped gametes
c) Gametes with one flagella
d) All of these
Explanation: Pyriform gametes means pear shaped gametes.
14. Dictyota belongs to
a) Bryophytes
b) Green algae
c) Brown algae
d) None of these
Explanation: Dictyota belongs to brown algae.
15. Red algae are red due to the presence of pigment
a) Phycoerythrin
b) r-phycocyanin
c) r-phycoerythrin
d) r-phepocyamin
Explanation: Red algae are red due to the presence of pigment r-phycoerythrin.
16. Red algae are found in
a) Cold seas
b) Seas with moderate temperature
c) Warm water
d) None of these
Explanation: Red algae are found in warm water.
17. Algae found in the areas where no light penetrates is
a) Green algae
b) Dinoflagellates
c) Red algae
d) Brown algae
Explanation: Red algae
18. Algae found in areas with abundant light as well as areas of great depths with no light is
a) Red algae
b) Green algae
c) Blue algae
d) Brown algae
Explanation: Red algae
19. Red algae are mostly
a) Unicellular
b) Multicellular
c) May be multicellular and unicellular
d) None of these
Explanation: Red algae are mostly multicellular.
20. Floridean starch is stored food found in
a) Some protist
b) Some bryophytes
c) Some algae
d) Prokaryotes
Explanation: Some algae