Both vessels and companion cells are absent in

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

Provide the missing terms for the following analogy-type questions:
$(i)$ Angiosperms : Flower :: Conifers : ...
(ii) Moss : Protonema :: Fern : ...

$A$ well-developed archegonium with $4-6$ rows of neck canal cells in the neck region is a characteristic feature of:

Find the odd one out from the following:

How many orders does the series Disciflorae contain?