What is the main difference between flowering and non-flowering plants?

Plants that reproduce through spores,such as mosses and ferns,are grouped under the name of .....

Explain briefly the following terms with suitable examples:
$(i)$ protonema
$(ii)$ antheridium
$(iii)$ archegonium
$(iv)$ diplontic
$(v)$ sporophyll
$(vi)$ isogamy

Cycas and Adiantum resemble each other in having:

The gametophytic plant body is nonvascular in which of the following?

Which of the following plants are embryophytes?