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6.05 Plants Honors
Transcript of 6.05 Plants Honors
If I gather four, random, samples of plant organisms, then I predict there is a 25% chance that each of the four plants will fall into the four categories: Bryophytes, Pteriodytes, Gymniosperms, and Angiosperms. I. Description
Bryophytes are nonflowering, non-vascular plants that have specialized tissues for the transport of water. The word “Bryophyte” is actually a name that is given to the plants that share this trait.
A. Bryophytes consist of mosses, hornworts, and liverworts. They all produce enclosed reproductive structures. However they do not flower, or produce seeds. Instead they produce spores. 1. Mosses
Mosses belong in a botanical division that consists of green, small, soft plants that are 1-10 centimeters tall. Mosses are classified as a Bryophyta when it comes to its phylum.
a. Mosses are located in damp environments such as wooded areas, edges of streams, etc. They can grow practically anywhere in cool, damp, cloudy climates (though some have adapted to sunny climates). I. Description
Pteridophytes are vascular plants that, like Bryophytes, do not flower or produce seeds and produce spores. Pteridophytes have highly specialized roots, stems and vascular systems.
A. The group, Pteridophytes consists of horsetails, ferns, club mosses, and quilworts. Interestingly, they are used for medicinal purposes as soil-binders and are even planted as ornamentals. I. Description
Gymnosperms are seed-bearing plants that consist of cycads, Ginkgo, and Gnetales. The word “gymnosperm” can be traced back to the Greek word “gymnospermos” meaning “naked seeds”.
A. “Naked seeds” means the seeds Gymnosperms produce are naked, like a pine cone tree; their seeds are the pine cones. 1. Pine Cone Trees
Pine Cone Trees are a part of the family Pinaceae. Pines are native to the Northern Hemisphere in temperate and subtropical regions of the world. The cones are mostly monoecious. The cones that are produced actually vary in size depending on the sex. Male cones are 1-5 cm long. Female cones are 3-60 cm long.
a. The phylum of Pine Cone Trees is called “Pinus”, the name tracing back to Latin origins, which has also traced back to Indo-European root. I. Description
Angiosperms are flowering plants that happen to be the most diverse group of plants. Angiosperms are seed producers; they produce enclosed seeds.
A. Angiosperms consist of many types of flowering plants such as Apple Trees, Creeping Thistle, and more. Pteridophytes: Ferns 1. Ferns
The fern is among the many specials of plants that belong to the botanical group, also its phylum, of Pteridophyta. They have xylem and phloem which distinguish them as vascular plants. This also makes them different from mosses. Ferns are moderately large, green, and have leafy edges.
a. Ferns are located in typically moist, forested areas. They are abundant in all damp situations. Some has also adapted to coastal, alpine, urban and desert locations too! Angiosperms: Apple Trees: 1. Apple Tree
Apple Trees are of the species Malus Domestica; the rose family, Rosaceae. They look like a normal tree at first glance, however when fully developed apple trees have, well, red fruits on them. In development Apple Trees are like the Japanese tree Sakura, they have pink flowers all over them (in fact they kind of resemble them a bit). Apple Trees are a part of the Magnoliophyta group when it comes to its phylum.
a. Apple Trees are located in cold weather areas that aren't too hot. They need full sunlight, and also grow best in elevations between 0-2500 ft above sea level. Analysis Part 1: 1. The key info that allows me to determine the plants was the fact that Bryophytes do not produce seeds or flower, but-from Ptreiodytes-Bryophytes are non-vascular plants, which Mosses are. Pteriodytes are vascular plants, which through a bit of research I've come to the conclusion that Ferns are vascular plants. Gymniosperms and Angiosperms both produce seeds. However Gymniosperms do not flower and produce “naked seeds”. I've come to learn that Pine Cone Trees have these traits. Angiosperms, however, produce enclosed seeds and flower, which Apple Trees do.
2. Mosses are Bryophytes
Ferns are Pteridophytes
Pine Cone Trees are Gymnosperms
Apple Trees are Angiosperms Analysis Part 2: 3. My hypothesis was correct, despite my low percentage prediction for each plant falling into each category.
4. The phylum of plants belongs to the taxonomy of organisms. The phylum enables us to determine the species of plants. Though some plants have a few of their classifications in common, the phylum is the breaking point-so to speak. References (information): *http://en.wikipedia.org/wiki/Bryophyte
*http://en.wikipedia.org/wiki/Phylum References (pictures): *http://images.tutorvista.com/content/kingdoms-living-world/members-of-bryophyte.jpeg