Select the wrong statement.
(1) Isogametes are similar in structure, function and behaviour
(2) Anisogametes differ either in structure, function and behaviour
(3) In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile
(4) Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
Isogamous condition with non-flagellated gametes is found in
1. Chlamydomonas
2. Spirogyra
3. Volvox
4. Fucus
Besides paddy fields, cyanobacteria are also found inside vegetative part of
(1) Pinus
(2) Cycas
(3) Equisetum
(4) Psilotum
Read the following statements (IV) and answer the question which follows them
I. In liverworts, mosses and ferns gametophytes are free living.
II. Gymnosperms and some ferns are heterospores.
III. Sexual reproduction in Fucus, Volvox and Albugo is oogamous.
IV. The sporophyte in liverworts is more elaborate than that in mosses.
How many of the above statements are correct?
(1) One
(2) Two
(3) Three
(4) Four
Which one of the following is a correct statement?
1. | Pteridophyte gametophyte has a protonemal and leafy stage |
2. | In gymnosperms female gametophyte is free-living |
3. | Antheridiophores and archegoniophores are present in pteridophytes |
4. | Origin of seed habit can be traced in pteridophytes |
The gametophyte is not an independent, free living generation in
(1) Adiantum
(2) Marchantia
(3) Pinus
(4) Polytrichum
Archegoniophore is present in
(1) Chara
(2) Adiantum
(3) Funaria
(4) Marchantia
A prokaryotic autotrophic nitrogen fixing symbiont is found in
(1) Cycas
(2) Cicer
(3) Pisum
(4) Alnus
Male and female gametophytes are independent and free-living in
(1) mustard
(2) castor
(3) Pinus
(4) Sphagnum
Which one of the following is considered important in the development of seed habit?
(1) Dependent sporophyte
(2) Heterospory
(3) Haplontic life cycle
(4) Free-living gametophyte