What do gymnosperms and angiosperms produce respectively for sexual reproduction?

$(i)$ Selaginella and Salvinia are heterosporous plants.
$(ii)$ The gametophyte of pteridophytes is called a prothallus.
$(iii)$ In Cycas,stems are unbranched.
$(iv)$ Gymnosperms are heterosporous.
How many statement$(s)$ is/are correct?

Which pair of plant groups is typically found in shade-loving habitats?

What is the importance of Agar-Agar?

Match the following:

List-$I$	List-$II$
$A$. Coleorhiza	$I$. Development of sporophyte directly from gametophyte without intervention of gametes
$B$. Apogamy	$II$. Development of gametophyte directly from sporophyte without the involvement of reduction division
$C$. Indusium	$III$. An unbranched columnar stem with a crown of leaves
$D$. Caudex	$IV$. Protective covering of radicle
-	$V$. Protective structure of a sorus

Match the items in Column-$I$ with Column-$II$ and select the correct option:

Column-$I$	Column-$II$
$(a)$ Peritrichous flagellation	$(1)$ Ginkgo
$(b)$ Living fossil	$(2)$ Macrocystis
$(c)$ Rhizophore	$(3)$ Escherichia coli
$(d)$ Smallest flowering plant	$(4)$ Selaginella
$(e)$ Largest perennial alga	$(5)$ Wolffia