Chapter 17: Seedless Vascular Plants


Phylum Monilophyta; p. 412; moderate; ans: F



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Chapter 17-final
Chapter 18-final
16. Phylum Monilophyta; p. 412; moderate; ans: F

The thick trunk of tree ferns is due to the functioning of a vascular cambium.


17. Phylum Monilophyta; p. 414; moderate; ans: T

In a eusporangium, the initials divide by the formation of walls parallel to the surface.


18. Phylum Monilophyta; p. 414; moderate; ans: T

The tapetum of a leptosporangium consists of two layers.


19. Phylum Monilophyta; p. 415; moderate; ans: T

Psilotum has tiny leaves but lacks roots.
20. Phylum Monilophyta; p. 417; moderate; ans: T

All ferns other than Psilotopsida and Marattiopsida are leptosporangiate.


21. Phylum Monilophyta; p. 417; easy; ans: F

Circinate vernation is a type of branching pattern in a megaphyll.


22. Phylum Monilophyta; p. 419; easy; ans: T

Sporocarps are produced by members of the genus Marsilea.


23. Phylum Monilophyta; pp. 419, 421; easy; ans: T

Horsetails are homosporous plants having jointed stems.


24. Phylum Monilophyta; p. 421; easy; ans: F

In Equisetum, strobili are clustered into sporangiophores.



Essay Questions
1. Evolution of Vascular Plants; pp. 391-392; moderate

Summarize the key events in the evolution of vascular plants from a charophycean-algal-like organism.


2. Organization of the Vascular Plant Body; pp. 393–394; moderate

Explain the differences between primary and secondary growth.


3. Organization of the Vascular Plant Body; p. 395; moderate

Discuss the evolution of tracheary elements. In what way is this an example of convergent evolution?


4. Organization of the Vascular Plant Body; pp. 395–396; difficult

Describe the three main types of steles and their hypothesized evolution.


5. Organization of the Vascular Plant Body; pp. 396, 397; easy

Describe the evolution of megaphylls.


6. Reproductive Systems; pp. 397-398; moderate

Discuss the main differences between homospory and heterospory.


7. Reproductive Systems; p. 398; moderate

Describe the ways in which the gametophytes of vascular plants have evolved.


8. The Phyla of Seedless Vascular Plants; p. 398; difficult

Discuss the evolution of primitive vascular plants by using representatives of the rhyniophytes, zosterophyllophytes, and trimerophytes.


9. Phylum Lycopodiophyta; pp. 403–409; moderate

Compare and contrast the Lycopodiaceae, Selaginaceae, and Isoetaceae.


10. Phylum Monilophyta; p. 414; moderate

How is the development of a eusporangium different from that of a leptosporangium?


11. Phylum Monilophyta; pp. 415–425; difficult

What are the features that distinguish the Psilotopsida, Polypodiopsida, and Equisetopsida? Sketch a representative life cycle of each.


12. Phylum Monilophyta; pp. 419-421, 424-425; moderate

Equisetum is probably the oldest surviving plant genus. Describe the structure and reproduction of this plant.
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