Which of the following plants is a Gymnosperm?

Give scientific reasons: Cone-bearing plants possess pointed,thick-cuticled leaves.

Coralloid roots have a symbiotic association with

Which of the following is found in the algal zone of $Cycas$ coralloid roots?

Top-shaped,multiciliate male gametes and the mature seed which bears only embryos with two cotyledons are characteristic features of which of the following?

The phloem of gymnosperms and angiosperms differs due to the presence or absence of . . . . . . .