Thursday, February 9, 2012

Is a fern highly organized?

the fern is plant

Is a fern highly organized?
Yes, a fern is organised. It contains distinctive tissues (mesophyll, epidermal, etc), organs (leaves, shoots, roots), and organ systems. It just doesn't have flowers, and that is what separates ferns (pteridophytes) from angiosperms.
Reply:A fern is a vascular plant that differs from the more primitive lycophytes in having true leaves (megaphylls), and from the more advanced seed plants (gymnosperms and angiosperms) in lacking seeds. Like all vascular plants, it has a life cycle, often referred to as alternation of generations, characterised by a diploid sporophytic and a haploid gametophytic phase. Unlike the gymnosperms and angiosperms, in ferns the gametophyte is a free-living organism. The life cycle of a typical fern is as follows:



1. A sporophyte (diploid) phase produces haploid spores by meiosis;

2. A spore grows by cell division into a gametophyte, which typically consists of a photosynthetic prothallus

3. The gametophyte produces gametes (often both sperm and eggs on the same prothallus) by mitosis

4. A mobile, flagellate sperm fertilizes an egg that remains attached to the prothallus

5. The fertilized egg is now a diploid zygote and grows by mitosis into a sporophyte (the typical "fern" plant).
Reply:To actually answer your question, yes a fern is considered to be highly organized, at least in comparison to the other non-vascualar plants. Ferns are special because they are the earliest ancestral plant that shows leaf-like structures, semi-modern reproductive structures and such. They are considered to be the ancestors to all vascular land plants.

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