381.
In Pinus, the pollen grain has 6 chromosomes then in its endosperm will have
A
12
B
18
C
6
D
24
Answer :
6
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382.
Cleavage polymbryony is found in
A
Cycas
B
Pinus
C
Funaria
D
Ephedra
Answer :
Pinus
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383.
If the chromosome number of cells of nucellus of emgasporangium of Pinus is 16 (sixteen) what would be the chromosome number of endosperm cells
A
32
B
16
C
48
D
08
Answer :
08
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384.
The heart shaped prothallus of Pteridium always
A
Monoecious
B
Dioecious
C
Both monoecious and dioecious
D
Not certain
Answer :
Monoecious
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385.
Compact and hard wood of Pinus is known as
A
Porous
B
Pycnoxylic
C
Manoxylic
D
Soft and loose
Answer :
Pycnoxylic
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386.
Winged pollen grains are formed in
A
Pinus
B
Cycas
C
Triticum
D
Solanum
Answer :
Pinus
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387.
Formation of sprophyte from a vegetative portion of prothallus is called
A
Apocarpy
B
Apogamy
C
Apomixis
D
Apospory
Answer :
Apogamy
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388.
The stem and petiole are covered with numerous brownish scale like structure which are called
A
Root hair
B
Hairs
C
Ramenta
D
Scales
Answer :
Ramenta
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389.
Riccia is a bryophyte Due to
A
Thalloid
B
Rhizoids
C
Alternation of generations
D
Dependent sporophyte
Answer :
Dependent sporophyte
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390.
In Pteridium the root are
A
Tap root
B
Adventitious roots
C
Rhizoids
D
Coralloid
Answer :
Adventitious roots
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