1.6.4-1.7

3. gymnosperms seeds are exposed on ____.
4. platyhelminthes has ____ as its excretory organ.
5. bryophytes and pteridophytes do not produce_______ .
7. gymnosperms, ________ only have tracheids, do not contain vessel element.
9. gametophyte generation is dominant in__________.
10. sponges lack body ____.
11. arthopoda has ____ circulatory system.
13. in tough ____.
15. angiosperms is complex, ___ vascular plants.
17. angiosperms do not require water for fertilisation because sperm cells are ___.
19. dominant generation for angiosperms is ____ generation (independent).
20. type of spores for angiosperms is __.
21. gametophyte generation is reduced ___ and depends on sporophyte for nutrients.

1. gymnosperm and angiosperm do not require_______ in fertilization.
2. What protects the embryo in bryophytes and pteridophytes?
4. after double fertilisation, seed consist of diploid _____ and enclosed by seed coat.
6. surround notochord and nerve cord.
7. most porifera are ____.
8. some gymnosperms have thick ___ to conserve water (needle-shape leaves).
12. provides skeletal support.
14. the body of Nematoda is
16. most gymnosperms have _ on which sporangium develop.
18. cindaria have ____ on tentacles.