What are homosporous plants?

The correct match is:

Choose correct pair from the following
$\mathrm{I})$ Primary producers: Important step in evolution

$\mathrm{II})$ Specific water requirement for fertilization of Pteridophytes: Restricted to narrow geographical regions

$\mathrm{III})$ Growth of young embryo in female gametophyte: Food cycle of aquatic animals

$\mathrm{IV})$ Colonization of mosses and Lichens on rocks: Ecological significance

Assertion: In Bryophytes & Pteridophytes, the number of male gametes produced is several thousand times the number of female gametes produced.

Reason: A large number of male gametes fail to reach the female gametes during transport.

Assertion $\left(\mathrm{A}\right):$ In pteridophytes, the gametophytes require cool, damp, shady places to grow.

Reason $\left(\mathrm{R}\right):$ Specific requirement and the need for water for fertilization, the spread of living pteridophytes is limited and restricted to narrow geographical regions.

The correct answer is:

Arrange the following plants with their respective classes in the same order. Sphenopsida, Psilopsida, Pteropsida, Lycopsida, Gnetopsida

A) Selaginella
B) Equisitum
C) Sphagnum
D) Adiantum
E) Psilotum
F) Gnetum

Assertion (A): The development of zygote into young embryo with in female gametophyte indicates the precursor for the seed habit.

Reason (R) : In pteridophytes, the gametophyte requires cool, damp, shady place to grow.

The correct option among the following is:

Pteriodophytes, especially ferns possess the following characteristics

i) Circinate vernation

ii) Ramenta

iii) Eustele

iv) Paraphysis

The correct combination is 

Origin of seed habit or its foundation was laid down in some pteridophytes, but seed formation did not occur because of

Which of the given features are common for the following plants?