Which of the following organisms possesses a cell wall made of cellulose?

Which of the following is a living fossil?

Consider the following statements regarding gymnosperms and choose the correct option.
$I.$ In gymnosperms,the male and female gametophytes have an independent existence.
$II.$ The multicellular female gametophyte is retained within the megasporangium.
$III.$ The gymnosperms are heterosporous.
Of these statements:

$S :$ $Thuja$ is a gymnosperm.
$R :$ In gymnosperms,the endosperm is formed after fertilization.

Describe the important characteristics of gymnosperms.

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