Mystery Organism

In: Science

Submitted By judyy123
Words 371
Pages 2
The mystery organism was inserted onto the petri dish on February 10, 2015 and took approximately 2 months to development and become visible without the use of a microscope.
In the first observation, striations were visible on the brown, rounded seed/spore like organism under 10x magnification. In the second observation, green pigments were visible on the organism and clear, root/hair like structures were visible under 10x magnification. The spores have germinated and has begun to develop into a young gametophytes. After water was inserted onto the petri dish, tiny particles appeared to be “swimming”. These particles are sperm, indicating that water was needed to facilitate the fertilization of the eggs. This indicates that the organism could be part of either the Bryophyta or the Pterophyta division. The root like structures, rhizomes, which indicates that this organism has vascular tissue, were sticking out of the gametophytes. All these characteristics correspond to plants in the Pterophyta and Bryophyta division.
In the thirds observation, heart shaped gametophytes are visible, verifying the conclusion that this organism is a fern, which is part of the Pterophyta division. The fern gametophyte has circular and the occasional heart shaped leaf. This is a clear indication that this gametophyte is a fern, since the moss gametophyte has long, skinny leaves. Under 10x magnification, scale like cells are visible on the gametophytes. Under the microscope, multiple leaves are growing, layered on top of each other.
Ferns and mosses have similar characteristics, but are very different in many ways. Ferns have a vascular system, xylem, and phloem enabling it to transport food and water throughout the leaves, while moss plants lack these structures. Both also alternate their generation, changing from gametophyte to a sporophyte. With a life cycle similar to that of the…...

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