1. Pear-shaped gametes are found in
a) Ectocarpus, dictyota and fucus
b) Ulothrix, spirogyra, and ectocarpus
c) Ectocarpus, gelidium and gracilaria
d) None of these
Explanation: Pear-shaped gametes are found in ectocarpus, dictyota and fucus.
2. The complex post-fertilization events are seen in
a) Chlorella and spirullina
b) Gracilaria and porphyra
c) Volvox and ulothrix
d) All of these
Explanation: The complex post-fertilization events are seen in gracilaria and porphyra.
3. Organisms referred to as amphibians of plant kingdom are
a) Pteridophytes
b) Bryophytes
c) Angiosperms
d) Gymnosperms
Explanation: Organisms referred to as amphibians of plant kingdom are Bryophytes.
4. Bryophytes are found in
a) Rocky places
b) Hilly areas
c) Moist and shady places
d) Aquatic areas
Explanation: Bryophytes are found in moist and shady places.
5. Organisms that play an important role in plant succession on base rocks are
a) Mosses
b) Pteridophytes
c) Protist
d) None of these
Explanation: Organisms that play an important role in plant succession on base rocks are Mosses.
6. Bryophytes requires _______ for fertilization
a) Nutrients
b) Water
c) Both (a) and (b)
d) None of these
Explanation: Bryophytes requires water for fertilization
7.Which of the following statement is incorrect with respect to bryophytes?
a) The plant body is thallus like, more differentiated than algae and attached to substratum
by the help of rhizoids
b) The antherozoids are released in water for fertilization.
c) Zygote formed undergoes meiotic cell division immediately
d) They have leaf like, stem like and root like structures
Explanation: "Zygote formed undergoes meiotic cell division immediately". This is incorrect.
8. The sporophyte of bryophytes develops after
a) Reduction division of zygote
b) Multiplication in zygote
c) Before the formation of zygote
d) None of these
Explanation: The sporophyte of bryophytes develops after multiplication in zygote.
9. Sporophyte of bryophytes is
I. Multicellular body
II. Parasite on gametophyte
III. Partially undergoes reduction division to form spores
IV. Derives the water from gametophytes
a) II and III
b) III and IV
c) Only I
d) All of these
Explanation: All of these
10. _______ forms gametophyte of bryophytes.
a) Zygote
b) Sporophyte
c) Gametes
d) Spores
Explanation: Spores forms gametophyte of bryophytes.