Ch.6 - Reproduction of Pteridophytes

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20 Terms

1
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seeds of pteridophytes

no seeds

2
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life cycle + generations of pteridophytes

haplodiplontic with the dominance of the sporophyte - while the gametophytes are greatly reduced in size and duration

3
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asexual reproduction of pteridophytes

fragmentation of rhizomes (underground stems)

4
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genus of ferns

polypodium vulgare

5
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conspicuous plant body of ferns

sporophyte

6
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classify ferns acc to types of spores

most -not all- homosporous

7
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spores are produced by

meiosis of sporocytes in sporangia

8
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gametophyte of ferns consists of

heart-shaped prothallus

9
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gametangia of ferns : where?

antheridia and archegonia are grown on the underside of the gametophyte

10
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fertilization in ferns (describe + type)

oogamy - flagellated sperms swim in a thin film of water to reach the neck of the archegonium - fertilizes the egg that remains attached to the prothallus

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what happens to the prothallus later ?

withers and dies as the embryo develops into a mature sporophyte ( soon after reproduction)

12
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the prothallus is the

gametophyte

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why is the sporophyte of ferns considered dominant ? so ferns are classified as ?

larger and lasts longer - ferns are perennial (bc sporophyte lasts long)

14
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genus of lycopodiopsida

selaginella

15
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classify lycopodiopsida acc to type of spores

heterosporous

16
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special characteristic of lycoposiopsida sporangia

grown in conelike strobilus

17
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describe the stobilus of lycopodioposida

megasporangia on the lower megasporophylls - microsporangia on the upper microsporophylls

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what about gametophyte formation in lycopodiopsida?

micro and mega sporocytes undergo meiosis - 4 spores (micro and mega) - gametophytes develop inside the sporangia (micro and mega too)

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special development of gametophytes in lycopodiopsida

endoprothally - development of gametophytes within their respective spore walls

20
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fertilization in lycopodiopsida cant happen unless

water carries the flagellated spores