1. Chlorophyll bearing, thalloid, simply, autotropic and mainly aquatic organisms are
a) Bryophytes
b) Protist
c) Algae
d) All of these
Explanation: Chlorophyll bearing, thalloid, simply, autotropic and mainly aquatic organisms are Algae.
2. Filamentous forms of algae are
a) Ulothrix
b) Spirogyra
c) Chlamydomonas
d) Both (a) and (b)
Explanation: Filamentous forms of algae are Ulothrix and Spirogyra.
3. Volvox is a
a) Unicellular algae
b) Filamentous algae
c) Colonial algae
d) Symbiotic algae
Explanation: Volvox is a Colonial algae.
4. The modes of reproduction found in algae are
a) Vegetative
b) Asexual
c) Sexual
d) All of these
Explanation: All of these
5. Vegetative reproduction in algae is by
a) Binary fusion
b) Fragmentation
c) Budding
d) Cyst formation
Explanation: Vegetative reproduction in algae is by Fragmentation.
6. Spore formation in algae occur during
a) Vegetative reproduction
b) Asexual reproduction
c) Sexual reproduction
d) During germination
Explanation: Spore formation in algae occur during asexual reproduction.
7. Isogamy is seen in
a) Chlamydomonas
b) Spirogyra
c) Both (a) and (b)
d) None of these
Explanation: Isogamy is seen in Chlamydomonas and Spirogyra.
8. Algae possesing both isogamy and anisogamy is
a) Chlamydomonas
b) Volvox
c) Spirogyra
d) Fucus
Explanation: Algae possesing both isogamy and anisogamy is Chlamydomonas.
9. Male gamete is small and motile and female gamete is large and immotile in
a) Fucus
b) Spirogyra
c) Ulothrix
d) All of these
Explanation: Male gamete is small and motile and female gamete is large and immotile in fucus.
10. 50 percent CO2 fixation on earth is carried out by
a) Protist
b) Higher plants
c) Algae
d) None of these
Explanation: 50 per cent CO2 fixation on earth is carried out by algae.