The scientist associated with Indian Paleobotany is.....

Select the correct match between Column $X$ and Column $Y$:

(Plant Name)	(Characteristic)
$(1)$ Oscillatoria	$(P)$ Thallus
$(2)$ Cycas	$(Q)$ Cell wall contains chitin mixed with cellulose
$(3)$ Fern	$(R)$ Primitive type of flowers
$(4)$ Yeast	$(S)$ Food stored as starch

Both gymnosperms and angiosperms bear seeds,then why are they classified separately?

Which of the following is a characteristic of Cryptogams?

When the sperms of $Funaria$ and $Pteris$ are put together near the archegonia of $Pteris$,only the sperms of $Pteris$ readily enter the archegonia and reach the egg. The reason being that

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