Flagellates: Difference between revisions
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Flagellates are microscopic, unicellular protists that are usually colorless or green. They are characterized by having one or more flagella, which is a hair-like whip organelle. There are many different types of flagellates, and they all have different lifestyles. Some are make up colonies and others live as single cells. | Flagellates are microscopic, unicellular protists that are usually colorless or green. They are characterized by having one or more flagella, which is a hair-like whip organelle. There are many different types of flagellates, and they all have different lifestyles. Some are make up colonies and others live as single cells. | ||
='''Environment'''= | ='''Environment'''= | ||
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: Cell Structure | : Cell Structure | ||
::Like all Flagellates, Euglena have a flagellum. They are green because they have chloroplasts, which are organelles that aid in photosynthesis and contain chlorophyll. They have a plasma membrane, which contains their cytoplasm and other organelles. A contractile vacuole removes excess water from the cell, and a reservoir located near the flagellum where the excess water is expelled. They also have a red eye spot, called a stigma, which is light sensitive and helps to guide their movement. | ::Like all Flagellates, Euglena have a flagellum. They are green because they have chloroplasts, which are organelles that aid in photosynthesis and contain chlorophyll. They have a plasma membrane, which contains their cytoplasm and other organelles. A contractile vacuole removes excess water from the cell, and a reservoir located near the flagellum where the excess water is expelled. They also have a red eye spot, called a stigma, which is light sensitive and helps to guide their movement. | ||
: | : Reproduction | ||
:: | ::During their free swimming life stage, Euglenas reproduce asexually using binary fission. This process involves parent cell DNA replication, and then it splits into two daughter cells. There is another life stage, however, when environmental conditions become unfavorable. In this case, Euglenas forms a thick-walled cyst to protect themselves until conditions become favorable again. | ||
==''Volvox''== | ==''Volvox''== | ||
:Cell Structure | :Cell Structure | ||
Revision as of 18:23, 11 April 2019
Overview
Flagellates are microscopic, unicellular protists that are usually colorless or green. They are characterized by having one or more flagella, which is a hair-like whip organelle. There are many different types of flagellates, and they all have different lifestyles. Some are make up colonies and others live as single cells.
Environment
Flagellates can be found in ponds, lagoons, and even shallow puddles. Wherever there are large amounts of soluble food, flagellates are there.
Examples
Euglena
- Cell Structure
- Like all Flagellates, Euglena have a flagellum. They are green because they have chloroplasts, which are organelles that aid in photosynthesis and contain chlorophyll. They have a plasma membrane, which contains their cytoplasm and other organelles. A contractile vacuole removes excess water from the cell, and a reservoir located near the flagellum where the excess water is expelled. They also have a red eye spot, called a stigma, which is light sensitive and helps to guide their movement.
- Reproduction
- During their free swimming life stage, Euglenas reproduce asexually using binary fission. This process involves parent cell DNA replication, and then it splits into two daughter cells. There is another life stage, however, when environmental conditions become unfavorable. In this case, Euglenas forms a thick-walled cyst to protect themselves until conditions become favorable again.
Volvox
- Cell Structure
References
[1] Bailey, Regina. “Eugena Cells.” ThoughtCo, 26 Jan. 2018, www.thoughtco.com/about-euglena-cells-4099133. [2] "Flagellates.” Environmental Leverage, 2003, www.environmentalleverage.com/Flagellates.htm. Palande, Leena. “Volvox Facts.” Biology Wise, biologywise.com/volvox-facts.