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Pterydophyta

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Pterydophyta

Postby victor » Fri Jun 10, 2005 1:33 pm

why pterydphyta still classified into low degree plant eventhough it has leaves, root etc that is like the high degree plat have?
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sorry (if I didn'd read them careful)

Postby mothorc » Fri Jun 10, 2005 2:36 pm

When I find on Google, they said that "Pterydophyta Spermatophyta: Angiospermae Dicotyledones ", it is Dicotyledones- a high revoluted plant
http://www.google.com.vn/search?q=ptery ... a=N&tab=iw

:mrgreen:
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Postby mith » Fri Jun 10, 2005 3:25 pm

They're ferns i.e. no flowers.
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Postby Poison » Fri Jun 10, 2005 4:26 pm

mothorc wrote:When I find on Google, they said that "Pterydophyta Spermatophyta: Angiospermae Dicotyledones ", it is Dicotyledones- a high revoluted plant
http://www.google.com.vn/search?q=ptery ... a=N&tab=iw

:mrgreen:


Yes, you didn't read cafefully.
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Postby MrMistery » Fri Jun 10, 2005 7:46 pm

There are a few reasons why pteridofytas are classified as inferior to gimnospermes. Here is 2 that come to my mind now
- They do not have seeds, so it is less probable for the embryo to survive
- Unlike gimnosperes and angiospermes the plant does not consist entirely of the spropyte... We can still speak of an alternance in generations
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Postby mothorc » Sat Jun 11, 2005 4:32 am

terrible sorry everybody
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Postby mith » Sat Jun 11, 2005 5:05 am

it's alright, that's why we have moderators :D.

For future reference though, I'd look into the text of the search results...not just the google summary.

P.S it's pterophyta
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Postby Poison » Sat Jun 11, 2005 6:22 pm

P.S it's pterophyta

As mush as I remember from lab notes, it is PTERIDOPHYTA.
It is mainly divided into these divisios:
PSILOPHYTA(=PSILOPHYTES)
LEPIDOPHYTA
CALAMOPHYTA
PTEROPHYTA

The differences btw Pteridophyta and Spermatophyta: (from lab notes.)
1-There must be water for fertilization.
2-Gametophytes live independent from the beginning of its life or from some stage of its life.
3-Sporophytes grow from zygote to mature without inturruption.
4-There are no seeds.
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Postby mith » Sun Jun 12, 2005 1:30 am

I think it's just a variant spelling. Both queries were redirected to the fern page in wikipedia.
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Postby MrMistery » Sun Jun 12, 2005 11:31 am

My bontany book also says pteridophyta. But many things are spelled differently in different countries. Despite this, I would expect something like this to be spelled the same everywhere because it is latin, no?
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Postby Poison » Sun Jun 12, 2005 6:23 pm

Pterophyta is a divisio of Pteridophyta. It writes like that in my notes.
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Postby MrMistery » Mon Jun 13, 2005 6:21 pm

What is a divisio? Do you mean division? As in part?
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