What is the ploidy level of the sporophytic phase in gymnosperms?

What are mycorrhiza and coralloid roots? Explain.

Assertion $A$: Gymnosperms occupy an intermediate position between Pteridophytes and Angiosperms. Reason $R$: In Gymnosperms,the ovules are naked and develop into naked seeds after fertilization. Which option is correct for Assertion $A$ and Reason $R$?

Which of the following plants does not have seeds enclosed within an ovary?

The spur of $Pinus \, sylvestris$ is:

Pine wood consists of almost entirely