(rather than herbaceous) in that the xylem often displays secondary growth (widening of the trunk).They generally have only tracheids for water conduction and lack vessel elements, which arecharacteristic of angiosperms.TyinoI. Division: CycadophytaAlthough there is only about 100 extant species of cycads, this phylum was significant during theTriassic period (248 million years ago). They are tropical and subtropical plants with trunk-like stemsand compound leaves and are popular as ornamentals. These plants are dioecious in that seedcones and pollen cones are on two separate plants. Because of their palm-like structure, they aresometimes incorrectly described as palm trees. However, like other gymnosperms they producecones and lack flowers. Examples of cycads include False king sago and Florida coontie (Zamiapumila). Zamia pumila is the only cycad native to the United States.ACTIVITY 1: Examine the live plant and/or cones if available. (Use the atlas if necessary.)olsmot bns elLenelII. Division: GnetophytaThere are about 70 species of gnetophytes, which include tropical shrubs and vines. Somespecies (e.g. Ephedra, Welwitschia) are found in deserts and other dry regions. Gnetophytesare believed to be the most closely related to flowering plants. They possess more efficientbowater-conducting cells (vessel elements) in their xylem, which is typical of angiosperms, butlsm erabsent in the other gymnosperms. The leaves of gnetophytes are also similar to that ofangiosperms and some species have flower-like structures. Gnetopytes are classified asgymnosperms primarily because their reproductive structures are cones (strobili).68

cones are the reproductive structures found in the conifers of the Gymnosperm of the plante kingdom.

Answered: pumila). Zamia pumila is the only cycad…

Biology 2e

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ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter25: Seedless Plants

Section: Chapter Questions

Problem 1VCQ: Figure 25.6 Which of the following statements about plant divisions is false? Lycophytes and...

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Figure 25.6 Which of the following statements about plant divisions is false? Lycophytes and pterophytes are seedless vascular plants. All vascular plants produce seeds. All non-vascular embryophytes are bryophytes. Seed plants include angiosperms and gym nosperms.
A botanist discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, she notes the following characteristics: flagellated sperm, xylem, separate gametophyte and sporophyte generations with the sporophyte dominant, and no seeds. This plant is probably most closely related to mosses. ferns. gymnosperms. O charophytes. flowering plants.
The photo below is a longitudinal section (I.s.) of the strobilus of Selaginella at 40x. How does this photo illustrate the importance of the previous question?
Characteristics Thallose Liverworts Leafy Liverworts Hornworts Mosses Representative Species Dominant stage Thallus types "Leaf" margin "Leaf" arrangement Midrib or costa in the "leaf" (+/-) Gemmae (+/-) Gametophores (+/-) Sporophyte parts Sporophyte life span (short/long) Chloroplasts in the sporophyte Structures for spore dispersal
Evolutionary relationships of bryophytes, chlorophytes, diatoma, gymnosperms, horsetails, lycophytes, phaenophytes, rhodophytes, angiosperms,lichens,gnetophyta, cyanobacteria, cycadophyta, ferns and pinaphytes.
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Table 1. Gametophytes of mosses, ferns, and flowers. Nonvascular or vascular Vascular Seedless or seed Plants Mosses (Bryophytes) Ferns (Pterophytes) Flowers (Angiosperms) Male Male Female Gametophyte Gamete Gametophyte Female Gamete Eggs
Fill in the blanks: is the apical archegonial tissue that protects the maturing sporophyte.
The classification of the seed plants has varied. If a person groups all seed plants together in one large Division Spermatophyta, then they have two classes—the class with naked seeds and the class , plants with carpels. On the other hand, many people (and this book) use four divisions, not one. List the three divisions of “gymnosperms” and the one division of flowering plants.
After following the life cycle of an unknown plant species, you determine it's life cycle in the following order: sporophyte -> meiosis -> gametophyte -> gametes -> double fertilization -> diploid zygote. Which plant group would you place this species? O pteridophyte O basidiomycete O bryophyte angiosperm O gymnosperm MacBook Pro Search or type URL 2$ 4 7 8
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Plants with seeds and evergreen needle-shaped leaves, but no flowers would be: angiosperms gymnosperms mosses O bryophytes

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pumila). Zamia pumila is the only cycad native to the United States. eb of anips ACTIVITY 1: Examine the live plant and/or cones if available. (Use the atlas if necessary.)