Is symbiosis just a sneaky way to take, take, take? - Futurity
In many ways, protozoa and algae are similar. In biological terms, they belong to the same kingdom. They are both composed of eukaryotic. The ecology of algae and protozoa, mainly concerned so far with the ef fect of the abiotic . Relationships between the phagotrophic organisms which involve. Protozoa (also protozoan, plural protozoans) is an informal term for single-celled eukaryotes, . Unlike plants, fungi and most types of algae, protozoans do not typically have a rigid cell wall, but are usually enveloped . Evolutionary relations are better represented by new classifications than by the traditional two kingdoms".
How Does Life Work? Symbiosis Crossing the Kingdoms Algae & Protozoa
Habitat[ edit ] Free-living protozoans are common and often abundant in fresh, brackish and salt water, as well as other moist environments, such as soils and mosses. Some species thrive in extreme environments such as hot springs  and hypersaline lakes and lagoons. Parasitic and symbiotic protozoa live on or within other organisms, including vertebrates and invertebratesas well as plants and other single-celled organisms.
Some are harmless or beneficial to their host organisms; others may be significant causes of diseases, such as babesiamalaria and toxoplasmosis.Biology - Microorganisms (Introduction to Protozoa) - CBSE Class 8
Isotricha intestinalisa ciliate present in the rumen of sheep. Association between protozoan symbionts and their host organisms can be mutually beneficial.
Flagellated protozoans such as Trichonympha and Pyrsonympha inhabit the guts of termites, where they enable their insect host to digest wood by helping to break down complex sugars into smaller, more easily digested molecules.
These include flagellates, such as Trichomonasand ciliated protozoa, such as Isotricha and Entodinium.
Some protozoans take in food by phagocytosisengulfing organic particles with pseudopodia as amoebae door taking in food through a specialized mouth-like aperture called a cytostome. Others take in food by osmotrophyabsorbing dissolved nutrients through their cell membranes.
For instance, the malaria parasite Plasmodium feeds by pinocytosis during its immature trophozoite stage of life ring phasebut develops a dedicated feeding organelle cytostome as it matures within a host's red blood cell. Some protozoa form close associations with symbiotic photosynthetic algae, which live and grow within the membranes of the larger cell and provide nutrients to the host.
Others practice kleptoplastystealing chloroplasts from prey organisms and maintaining them within their own cell bodies as they continue to produce nutrients through photosynthesis.
The ciliate Mesodinium rubrum retains functioning plastids from the cryptophyte algae on which it feeds, using them to nourish themselves by autotrophy. These, in turn, may be passed along to dinoflagellates of the genus Dinophysiswhich prey on Mesodinium rubrum but keep the enslaved plastids for themselves.
Within Dinophysis, these plastids can continue to function for months.
The group includes flagellates which move with the help of whip-like structures called flagellaciliates which move by using hair-like structures called cilia and amoebae which move by the use of foot-like structures called pseudopodia. Some protozoa are sessileand do not move at all.
Symbiosis in protozoa - Faculty of Science Repository
The scientific community has eased species identification by creating seven different groups that categorize species with similar chemical processes, color, anatomy and behavior.
Yellow-green algae are colonial species that grow in freshwater, and brown algae are commonly known as seaweed. Unicellular varieties are euglenoids, golden-brown algae and fire algae. The green and red types of algae both range in size from microscopic to macroscopic.
Sciencing Video Vault Characteristics of Protozoa The term "protozoa" was popular in the 20th century but has now become obsolete. The group includes members of the Kingdom Protista that do not have chloroplasts and therefore have no color. All protozoa were thought to be eukaryotic and unicellular.
Is symbiosis just a sneaky way to take, take, take?
It is now known that the organisms classified as protozoa are not closely related. Although the term does not meet all current classification needs, it is still used for describing the general characteristics of a very diverse group. Protozoa can reproduce both sexually and asexually, are eukaryotic and either ingest or absorb their nutrients from the surrounding environment. Types of Protozoa Protozoa are divided into four phyla: Sarcodina, Mastigophora, Ciliophora and Sporozoa.
The phylum Sarcodina includes amebae and related organisms. Unicellular and motile, they gather food by surrounding it with the cell membrane through the use of arm-like pseudopods.