Its main characteristic, already has a transport vessel. Another feature, already has roots, stems and leaves true.
Includes:
- Pteridophyta (ferns)
- Spermatophyta (seed plants).
Pteridophyta (ferns)
Characteristics:
- Chlorophyll
- Already have: a branched and woody stems, leaves with leaf veins are clear even though there are no leaves, roots are an outgrowth of the rhizoid
- The transport vessels (xylem and phloem)
- Reproduce by producing spores
- Young leaves curled or rolled.
Example:
1. lycopodium
2. selaginella
3. marsilea
4. Equisetum.
Spermatophyta (seed plants)
Divided into:
- Gymnosperms (seed plants open)
- Angiosperms (seed plants closed).
Gymnosperms
Characteristics:
1. seeds are not covered by the leaves of fruit
2. body in the form of a bush or tree trunk hard and woody
3. upright trunk and branches
4. rooted riding
5. leaves rigid, narrow or wide, flat rare
6. do not have a real interest, genitals are arranged in a body called Strobilus.
Example:
- Cycas rumphii (cycads)
- Agathis alba (resin)
- Gnetum gnemon (melinjo).
Angiospermae
Characteristics:
1. seeds covered by fruit leaves, so it is not visible from the outside
2. already has a flower
3. leaves varies.
Angiosperms are divided into 2, namely:
1. dicotylae (dikotil)
2. monocotylae (monocots).
The difference between monocots dikotil with are:
Dikotil:
- Seeds into pieces two
- Roots riding
- Berkambium trunk, branches, trunk segments is not clear
- A bone pinnate leaves or menjari
- Flower parts are 4, 5 or multiples.
Monocots:
- Seeds dashed one
- Root fibers
- Berkambium not stem, roots, stem segments clearly
- Arrangement of leaves bone is aligned
- Flower parts totaling 3 or multiples.
Example:
Dikotil: jack fruit, nuts, and cashew.
Monocots: corn, palm, coconut and banana.
Kamis, 14 Maret 2013
