Mosses and ferns are

In bryophytes and pteridophytes,$.......$ is required for the transport of male gametes.

Read the following examples: Cycas,Equisetum,Adiantum,Pinus,Polytrichum,Funaria,Ginkgo,Selaginella,Sphagnum,Polysiphonia,Salvinia,Marchantia. How many examples have a sporophyte with vascular tissue?

Compared with the gametophytes of the bryophytes,the gametophytes of vascular plants are:

Match Column $X$ with Column $Y$ and select the correct option:

Column $X$	Column $Y$
$(1)$ Christmas tree	$(P)$ Rhynia
$(2)$ Fossil Pteridophyte	$(Q)$ Araucaria
$(3)$ Diplontic life cycle	$(R)$ Ectocarpus
$(4)$ Haplodiplontic life cycle	$(S)$ Fucus

What is common among $Porphyra$,$Agaricus$,$Chlorella$,and $Spirulina$?