471. Sex organ in bryophytes are
A
Unicellular and jacketed
B
Unicellular and non-jacketed
C
Multicellular and jacketed
D
Multicellular and non jacketed
Answer :
Multicellular and jacketed
472. Gametophyte embedded in sporophyte in
A
Bryophyta
B
Pteridophyta
C
Cryptogams
D
Spermatophyta
Answer :
Spermatophyta
473. The capsule of sporogonium of fern contains
A
32 or 64 spores
B
8 spores
C
128 spores
D
16 spores
Answer :
32 or 64 spores
474. Pyrenoid is found in one of the following organs of Spriogyra
A
Nucleus
B
Chloroplast
C
Cytoplasm
D
Cell wall
Answer :
Chloroplast
475. Aquatic fern which supports the growth of blue green algae, Anabaena, and used to increase the yields of paddy crop is
A
Salvinia
B
Marsilea
C
Isoetes
D
Azolla
Answer :
Azolla
476. In Angiosperms, functional megaspore develops into
A
embryo sac
B
ovule
C
endosperm
D
pollen sac
Answer :
embryo sac
477. Structures for dispersal of spores in bryophyta are
A
Elaters
B
Pseudoelaters
C
Peristome teeth
D
All of the above
Answer :
All of the above
478.
Examine the figure given below and select the right option giving all the four parts (1, 2, 3 and 4) correctly identified
A
1-Archegoniophore,
2-Female thallus,
3-Gemmacup,
4-Rhizoids
B
1-Archegoniophore,
2-Female thallus,
3-Bud,
4-Foot
C
1-Seta,
2-Sporophyte,
3-Protonema,
4-Rhizoids
D
1-Antheridiophore,
2-Male thallus,
3-Globule,
4-Roots
Answer :
1-Archegoniophore,
2-Female thallus,
3-Gemmacup,
4-Rhizoids
479. Change in colour of algae according to depth in sea is called
A
Bohr's effect
B
Gaukdikov's effect
C
Fogg's effect
D
Pasteur effect
Answer :
Gaukdikov's effect
480. Which type of rhizoids are present in Riccia
A
Unicellular and smooth
B
Multicellular and smooth
C
Unicellular, smooth & tuberculated
D
Multicellular smooth & tuberculated
Answer :
Unicellular, smooth & tuberculated