Q70 of 525 Page 254

Name the subdivision in which xylem contains vessels.

Angiosperms have highly developed vascular tissue system with vessels in the xylem and companion cells in the phloem.

Name the class of angiosperms in which :

(a) reticular venation is present.

(b) leaves show parallel venation.

Name the sex organs of gymnosperms and angiosperms.

What are phanerogams?

What are nonchordates?