Single-celled, free-living organisms; often feed off bacteria.

An animal phylum of unicellular, eukaryotic micro-organisms, the most important groups of which for paleoclimatology are Foraminifera and radiolarians. Protozoa range in size from 0.1 mm to 8 cm. Some classification systems group the Protozoa with other simple eukaryotic organisms in the kingdom Protista.

are single celled animals, some contain chlorophyll and made some food. Others eat bacteria. Some are huge; visible to naked eye; larger than some inveretbrates.

an older term used to describe the "animal-like" protists

One-celled eukaryotic organisms belonging to the kingdom Protista.

Microscopic animals, sometimes pathogenic in humans. They include Giardia and Cryptosporidium, which live in water.

Small, one-celled organisms, including amoebae, ciliates and flagellates.

Free-living, nonphotosynthetic, single-celled, motile eucaryotic organisms, especially those, such as Paramecium or Amoeba, that live by feeding on other organisms.

one-celled microscopic animals needed to help breakdown organic matter.

Small one-celled animals including amoebae, ciliates and flagellates.

A large, diverse, and widespread group of mostly microscopic non-cellular animals, including both free-living and parasitic forms.

Simple organisms that are usually composed of a single cell; most are free-living but some are capable of producing disease in animals or humans.

a single-celled or colonial organism that lives primarily by ingesting food

A Kingdom that includes only single-celled organisms like amoeba, stentor, vorticella, and colonial ciliates.

A group of single-celled organisms classified by some biologists as a single phylum; includes the flagellates, amoebas, and ciliates. This textbook follows most modern classifications in elevating the protozoans to a distinct kingdom (Protista) and each of their major subgroups to the rank of phylum.

A unicellular microorganism that has the means to move around either by cilia or a flagella.

Microscopic, single-celled organisms.

in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers

a unicellular parasite

one-celled organisms like bacteria. Protozoa also love moistures and often spread diseases through contaminated water.

Large microorganisms, which consume bacteria.

microscopic organisms, like amebas and paramecia, that belong to the Protozoa phylum of protists and which reproduce by fission.

Single-celled complete organisms (sometimes pathogenic).

simple, unicellular animals comprising some 50,000 organisms.

Single-celled micro-organisms

Microscopic, single celled animals.

Any of a large group of single-celled, usually microscopic, organisms such as amoeba.

Microscopic animals causing disease in humans.

A group of organisms in the Protist Kingdom. Examples of protozoa include amoebas, euglena, and paramecium.

PRO-toe-ZO-a Single-celled eukaryotes often classified by their mode of movement, including amoebae, euglenae, and paramecia. 458

A group that encompasses all animals that are acellular (no cell structure) or unicellular (only one cell). Protozoans are extremely varied in morphology and physiology, and often have complex life cycles. They occur in almost every type of habitat. See also: Metazoa

small single-cell animals, usually microscopic, that are larger and more complex than bacteria. (including amoebas, ciliates and flagelates)

Single-celled, eucaryotic microorganisms without cell walls. Most protozoa are free-living although many are parasitic. The majority of protozoa are aerobic or facultatively anaerobic heterotrophs.

one-celled, animal-like organisms, many of which are capable of movement.

Any of a large group of single-celled organisms, usually microscopic, eukaryotic, such as amoebas, ciliates, flagellates, and sporozoans.

A unicellular protist that is considered to be animal-like because it gets its energy from ingested food.

A single-cell organism that can only divide within a host organism. Malaria is caused by a protozoa: Plasmodium. Other protozoan parasites Giardia and Toxoplasma.

Single-celled protists grouped by their method of locomotion. This group includes Paramecium, Amoeba, and many other commonly observed protists. PICTURE 1 | PICTURE 2

a subkingdom comprising the simplest of animal life.

Tiny, mostly microscopic animals each consisting of a single cell or a group of more or less identical cells, and living primarily in water. Some are human pathogens.

One-celled microorganisms, without chlorophyll, that are associated with animals.

lit., the first animals; the lowliest forms of life, all single-celled.

Single-celled microscopic animal. Plural protozoa.

single celled animals that are usually motile (can move from place to place)

One-celled organisms. Most live in water, but some live in the soil. Despite their microscopic size, protozoa carry out the bodily functions of higher animals, such as digestion, respiration, and excretion.

Single-celled animal-like microscopic organisms that must live in the presence of water.

Gr. protos - first, primary; Gr. zoon - animal]. The Subkingdom of the Kingdom Animalia, in older classification systems, that includes all unicellular organisms that lack differentiated tissues and that primarily reproduce through asexual means, although conjugation does occur.

Unicellular eukaryotic microbes that lack cell walls.

A group of one-celled animals, a few of which cause human disease (including malaria and sleeping sickness).

The lowest great division of the Animal Kingdom. These animals are composed of a gelatinous material, and show scarcely any trace of distinct organs. The Infusoria, Foraminifera, and sponges, with some other forms, belong to this division. 177

Single-celled organisms with animal-like cells, including amoeba, ciliates, and flaggelates.

Large group of one-celled (unicellular) animals, including amoebas. Some protozoa cause parasitic diseases in persons with AIDS, notably toxoplasmosis and cryptosporidiosis. See PPneumocystis jiroveci Pneumonia (PCP) .

(Plural form of protozoan) Single-celled organisms (not bacteria) of which about 30 kinds cause disease in humans.

Heterotrophic eukaryotic unicellular organisms that belong to the kingdom protista.

(typically) one-celled, non-photosynthetic eukaryotes that generally lack a cell wall sedimentary structures: features in sediment/sedimentary rock made by processes such as wind, water, gravity, ice, or biota.

Microscopic, usually single-celled microorganisms which live in water and are relatively larger in comparison to other microbes.

minute, usually single-celled, organisms which do not photosynthesise. Singular is protozoan or protozoon Humans as organisms

One-celled animals that are larger and more complex than bacteria. May cause disease.

parasitic, single-celled, microscopic organisms

Single_celled eucaryotic organisms such as amoeba

Protozoa (in Greek proto = first and zoa = animals) are single-celled eukaryotes (organisms whose cells have nuclei) that commonly show characteristics usually associated with animals, most notably mobility and heterotrophy. They are often grouped in the kingdom Protista together with the plant-like algae and fungus-like water molds and slime molds. In some newer schemes, however, most algae are classified in the kingdoms Plantae and Chromista, and in such cases the remaining forms may be classified as a kingdom Protozoa.