According to a system of plant classification,which of the following pairs represents the group $Spermatophyta$ correctly?

$A.$ In $Volvox$,the zygote undergoes meiosis to form four haploid cells immediately before germination.
$R.$ $Volvox$ exhibits a haplontic life cycle.

Most algal genera show a haplontic life cycle. Name an alga which is:
$(a)$ Haplo-diplontic
$(b)$ Diplontic

Into how many groups are the Thallophytes divided?

Read carefully the following statements:
$I.$ Funaria possesses unicellular and unbranched rhizoids.
$II.$ Gemmae are asexual buds, which originate from small receptacles called gemma cups.
$III.$ The Sphagnum plants have a magnificent property of retaining water.
$IV.$ Mosses along with lichens are the first organisms to colonise rocks.
Which of the statements given above are correct?

Algae differ from Bryophyta in possessing