451.
In Ulothrix, colony formation occurs during
A
Formation of aplano spores
B
Formation of zoospores
C
Plamell stage
D
All of the above
Answer :
Plamell stage
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452.
The number of flagella in the gametes of Ulothrix is
A
Six
B
Four
C
One
D
None of the above
Answer :
None of the above
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453.
In which of the following plant archegonium is absent
A
Spirogyra
B
Funaria
C
Pteris
D
Cycas
Answer :
Spirogyra
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454.
Pteridium shows
A
Only true indusium
B
Only false indusium
C
A and B both
D
None of the above
Answer :
A and B both
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455.
Unique features of Bryophytes is that they
A
produce spores
B
have sporophyte attached to gametophyte
C
lack roots
D
lack vascular tissues
Answer :
have sporophyte attached to gametophyte
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456.
Which of the following cannot fix nitrogen?
A
Nostoc
B
Azotobacter
C
Spirogyra
D
Anabaena
Answer :
Spirogyra
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457.
In which of the following gametophyte is not independent free living ?
A
Marchantia
B
Pteris
C
Pinus
D
Funaria
Answer :
Pinus
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458.
The peristome in Funaria consists of at maturity
A
One series of curved narrow triangular teeth, 16 in number
B
One series of curved narrow triangular teeth,32 in number
C
Two series of curved triangular teeth 8 teeth in each series
D
Two series of curved, narrow triangular teeth, 16 teeth in each series
Answer :
Two series of curved, narrow triangular teeth, 16 teeth in each series
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459.
Which of the following plants produces seeds but not flowers
A
Maize
B
Mint
C
Peepal
D
Pinus
Answer :
Pinus
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460.
Sclerenchymtous hypodermis is Pinus needle helps in
A
Mechanical support
B
Checking transpiration
C
Photosynthesis
D
Increasing the absorptive surface of the cell
Answer :
Mechanical support
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