541.
Vegetative reproduction in Ulothrix takes place by
A
Parthenogenesis
B
Fragmentation
C
Harmogonium
D
Aplanospore
Answer :
Fragmentation
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542.
In Pinus the megaspore after germination develops into
A
Endosperm with naked egg
B
Endosperm with embryo sac
C
Endosperm with archegonia
D
Pollen tube with motile male gamates
Answer :
Endosperm with archegonia
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543.
Pinus seed cannot germinate and establish without fungal association. This is because:
A
its embryo is immature
B
it has obligate association with mycorrhizae
C
it has very hard seed coat
D
its seeds contain inhibitors that prevent germination
Answer :
it has obligate association with mycorrhizae
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544.
The main conducting part inside the capsule of Funaria is
A
Apophysis
B
Columella
C
Theca
D
None of the above
Answer :
Columella
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545.
A leafy gametophyte plant with multicellular rhizoids and sprophyte differentiated in foot, seata and capsule should belongs to
A
Psilopsida
B
Hepaticopsida
C
Bryopsida
D
Lycopsida
Answer :
Bryopsida
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546.
The sexual reproduction in which cells of two different spirogyra filaments conjugate is known as
A
Lateral conjugation
B
Scalariform conjugation
C
Parthenospory
D
Azygospory
Answer :
Scalariform conjugation
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547.
Spore of Funaria on germination give rise to
A
Protonema
B
Embryo
C
Antheridia
D
Archengonia
Answer :
Protonema
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548.
Cap cells occur in
A
Oedogonium
B
Diatoms
C
Dino flagellates
D
Euglena
Answer :
Oedogonium
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549.
In Chlorophyceae, sexual reproduction occurs by
A
Isogamy and anisogamy
B
Isogamy, anisogamy and oogamy
C
Oogamy only
D
Anisogamy and oogamy
Answer :
Isogamy, anisogamy and oogamy
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550.
Spirogyra belongs to
A
Volvocales
B
Conjugales
C
Ulothrichales
D
Siphonales
Answer :
Conjugales
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