What was the link between gymnosperms and angiosperms?

2009-05-15 8:55 pm
Was it Conifer trees that lead rise to normal trees which "de-evolved" into smaller scrubs. Or was it gymnosperms scrubs that evolved to Angiosperms that eventually grew oddly like there in this case non related cousins.
更新1:

No... I was in class and I formulated this question in my head. Since my science teacher sucks at expaining anything I asked it here.

回答 (4)

2009-05-15 9:48 pm
✔ 最佳答案
Here you can see a phylogeny (relationship tree) of vascular plants (plants that have "tubes" that conduct water in their roots and stem):

http://www.gigantopteroid.org/images/DoyleSeedPlantPhylogeny2008.gif

In red below are the Angiosperms. In brown and green above are the Gymnosperms (Taxaceae through Cycadales). Both have a common ancestor that was neither a Gymnosperm nor an Angiosperm, and they did not evolve into each other. Conifers are modern lineage mainly in the family Pinaceae and Araucariaceae that are adapted to cold or dry climates. They are very distant from modern Angiosperms.
2009-05-16 12:37 am
Gymnosperms: any of a group of vascular plants that produce naked seeds not enclosed in an ovary, that were formerly considered a class.

Angiosperms: any of a class (Angiospermae) or division (Magnoliophyta) of vascular plants (as magnolias, grasses, oaks, roses, and daisies) that have the ovules and seeds enclosed in an ovary, form the embryo and endosperm by double fertilization, and typically have each flower surrounded by a perianth composed of two sets of floral envelopes comprising the calyx and corolla —called also flowering plant.
2016-05-31 4:00 pm
It's an angiosperm. Angiosperms grow flowers, and strawberries grow from flowers. Here is what the flowers look like, at the link below:
2009-05-16 1:19 am
I'm having trouble figuring out if someone hacked your account, if this is literally a question from homework, or you really do just ACT stupid and are privately a ******* genius...


Also, cocks.


收錄日期: 2021-05-01 12:25:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090515125511AAg5bUC

檢視 Wayback Machine 備份