The male gametes of bryophytes are . . . . . . .

The peristomial teeth in $Funaria$ are

What is the contribution of the botanist Rothmaler in the classification of plants?

Which plant group has a dominant, haploid, and photosynthetic gametophyte stage?

Assertion $(A)$: $Riccia$ is a very simple and primitive bryophyte.
Reason $(R)$: In $Riccia$,after fertilization,the zygote undergoes division to form an embryo.

Who amongst the following is regarded as the "Father of Indian Bryology"?