Names of diseases caused by protozoa include malaria, diarrhea, dysentery and colitis. In animals, the organisms may cause coccidiosis and toxoplasmosis. Symptoms of a protozoan infection include nausea, abdominal pain and bloating.Continue Reading
Protozoa that live in a human’s intestine may be passed to another human via fecal-oral means, such as ingestion of contaminated food or water. Protozoan in human blood and tissue may be transmitted by an arthropod vector.
Protozoa are single-celled organisms that are too tiny to be seen with the naked eye, and their ability to multiply very fast in humans enhances their ability to survive. Some protozoa include Cryptosporidium parvum, Isospora belli and Balantidium coli.Learn more about Zoology
Algae and protozoa are in the same kingdom, Protista, because the initial creation of this kingdom was done on the basis of superficial resemblance, and these eukaryotic and largely single-celled organisms seemed to resemble one another more than any other group. The three major groups of protists -- protozoa, algae and slime molds -- are not particularly closely related. Yeasts, despite being single-celled eukaryotes, are classified as fungi, not protists.Full Answer >
Although members of the kingdom Animalia are almost exclusively multicellular, there are several unicellular organisms classified as animals, including species of bacteria, protozoa, fungi, algae and archaea. Bacteria are unicellular organisms of microscopic size that contain no nucleus. They are hardy life forms that can survive in extreme environmental conditions.Full Answer >
The deadliest animal in the world is the anopheles mosquito, which can carry malaria. According to the Centers for Disease Control, malaria killed nearly 700,000 people and sickened about 220 million people around the world in 2010.Full Answer >
Names for groups of animals include pods of whales, exaltations of larks, knots of toads, packs of dogs, parliaments of owls and sloths of bears. In addition, cattle, horses and deer are all grouped into herds.Full Answer >