When Did Gymnosperms Evolve?


What was the first seeded plants to evolve?

I have either the gymnosperms or angiosperms.

If you have to pick between those two, pick the gymnosperms.

If you look into the fossil record, the earliest seed plants weren't really like modern plants.

How are cactuses and gymnosperms similar?

The plural of Cactus is Cacti and not Cactuses.

The similarities between cactus and gymnosperms are as follows:
1. Both are flowering plants. (Cacti are angiosperms means the fruit is formed but the gymnosperms are with naked seeds.)
2. Most of the gymnosperms like cacti are adopted to desert atmosphere. eg. Cycas
3. Pines possess the leaves which are needle shaped like most of the cacti.

Xylem, phloem, and gymnosperms?

What are the functions of xylem and phloem? also, what are some economic uses of gymnosperms? I'm bad at science..

xylem and phloem are vascular tissues. Xylem transports water and minerals from roots to shoots. Phloem transports food/sugars from source to sink. (normally from leaves to other parts of the plant).

Gymnosperms are different. They are not flowering plants because those are angiosperms. Gymnosperms are "naked seed plants." Examples are pines, cycads, ginkgos.

Gymnosperms are used as medicines (as Ginkgo biloba can enhance memory). Also, pine cones can be used as ornaments. =)

explain the difference between gymnosperms and angiosperms?

gymnosperms are cone bearing plants that produce a naked seed (like pine trees). Many gymnosperms are evergreen.
Angiosperms are flowering plants that produce a covered seed (fruit). Angiosperms are any plant that produces flowers. Angiosperms usually deciduous (drop their leaves in fall)
There are many more angiosperms than gymnosperms.

What was the link between gymnosperms and angiosperms?

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. 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.

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.

More Questions