1. Most are microscopic.

2. Most are single celled.

3. Some can perform photosynthesis, making them autotrophs.

4. Some are heterotrophs.

5. They can produce asexually (by themselves) or sexually (exchanging genetic material with partners).

6. Some of them can move by means of cilia or flagella.

7. Similar to Fungi in modes of reproduction.

Organism 1: Plasmodium vivax

Kingdom-Protista

Phylum- Apicomplexa

Class- Aconoidasida

Order- Haemosporida

Family- Plasmodiidae

Genus- Plasmodium

Species- P. Vivax

     Figure 22: P. vivax diagram

                 Figure 16: Plasmodium vivax magnified 1000x

 

Plasmodium vivax is a human pathogen and a protozoal parasite. Plasmodium vivax is one of the six most frequent causes of Malaria in humans. P. vivax is carried by a mosquito called the female Anopheles. It mainly lives in the United States, Latin America, and in some parts of Africa [24]. It is uncommon to find Plasmodium vivax in cooler areas, and it lives near high populations of people and mosquitos. They have the same shape as a signet ring. They are about ⅓ the diameter of a red blood cell [24]. There are some beliefs that the mosquitos carrying Plasmodium vivax havehorizontally acquired genetic material from humans. This is done by it latching on an exchanging DNA when sucking the blood from humans. [24]


Why does it belong here?

Plasmodium vivax is a member of the Kingdom Protista because it is eukaryotic and can not be classified as a fungus, a plant, or as an animal. 

Organism 2:  Trypanosoma brucei

(unranked):   Excavata

Phylum:         Euglenozoa

Class:               Kinetoplastea

Order:              Trypanosomatida

Genus:           Trypanosoma

Species:        T. brucei

                             Figure 17: Trypanosoma brucei  magnified

Figure 23: Trypanosoma brucei diagram


Trypanosoma brucei is a species of a parasitic kinetoplastid that is a major cause for a vector-disease in humans and other vertebrates. The tsetse fly lives in Africa and is the insect that carries the parasite Trypanosoma brucei [25]. If the fly gives a human the parasite by biting them, the human will develop African trypanosomiasis, the sleeping sickness. It measures 8 to 50 μm in length [25]. Its body is elongated and has a tapered, thin shape. There is an unusual organelle that can be found in this organism. It is called the kinetoplast, which is made from a lot of small round Mitochondrial DNA, and when they all go together they function as one large mitochondrion [25]. T. Brucei can be found wherever the vector flies are present. They live in subtropical and tropical areas in East, Central and West Africa, where the flies live. This organism is not beneficial; rather it causes people to get very sick and weak. The disease caused by the parasite can cause things like anemia and fatigue [25].


Why does it belong?

Trypanosoma brucei is a eukaryotic unicellular organism. It is a member of the Protista kingdom because it is not a plant, animal, or fungus. It is unicellular, and most of the members of Protista or unicellular.