Life Cycle of Pteridophytes
Trending Questions
Q. Which one of the following is a correct statement?
- Pteridophytic gametophyte has a protonemal and a leafy stage
- In gymnosperms, the female gametophyte is free-living
- Antheridiophores and archegoniophores are present in pteridophytes
- Origin of seed habit can be traced to pteridophytes
Q.
Alternation of generation exhibited by some cnidarians is called:
Metamorphosis
Metamerism
Metaphysic
Metagenesis
Q. The correct description of sporophyte of Marchantia and gametophyte of a fern is:
- The sporophyte of Marchantia is diploid while the gametophyte of fern is haploid
- Both lack vascular tissues
- Both are free living structures
- Both represent the dominant generation in their respective life cycles
Q.
what are xerophytic, mesophytic, halophytic species?
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Q.
Describe Haplo-diplontic lifecycle.
Q.
A comparison of the species that havedeclined over the last five years with those that haveincreased reveals that more xerophytic species are onthe increase.
Q.
When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?
Q. Read statement ′a to d′ and find out how many is/are incorrect statement(s).
(a) In majority of the pteridophytes, all the spores are of similar kinds.
(b) Genera like Selaginella and Salvinia produce two kind of spore.
(c) The development of the zygote in the young embryos take place within the female gametophytes. This event is a precursor to the seed habit.
(d) Azolla is an aquatic fern that is used as biofertilizer due to the presence of nitrogen fixing cyanobacteria.
(a) In majority of the pteridophytes, all the spores are of similar kinds.
(b) Genera like Selaginella and Salvinia produce two kind of spore.
(c) The development of the zygote in the young embryos take place within the female gametophytes. This event is a precursor to the seed habit.
(d) Azolla is an aquatic fern that is used as biofertilizer due to the presence of nitrogen fixing cyanobacteria.
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Q. The prothallus represents
- gametophyte of fern
- sporophyte of angiosperm
- sporophyte of gymnosperm
- sporophyte of bryophyte
Q. Sex organs in Funaria develop
- In protonema
- Outside capsule
- At the tip of leaf
- At the tip of gametophore