The plant body of $Riccia$ is:

Which of the following is responsible for peat formation?

$Marchantia$ is considered as a heterothallic plant because it is

What is the chromosomal status of the gametophytic stage in bryophytes?

The peristomial teeth in $Funaria$ are

Given below are two statements: One labelled as Assertion $A$ and the other labelled as Reason $R$:
Assertion $A$: The first stage of gametophyte in the life cycle of moss is protonema stage.
Reason $R$: Protonema develops directly from spores produced in capsule.
In the light of the above statements,choose the most appropriate answer from options given below: