Fungus
... divided into two basic morphological forms, yeasts and hyphae. Yeasts are
unicellular fungi which reproduce asexually by blastoconidia formation (budding) or ... sporangia . A few other fungi have reverted from a mycelial to a
unicellular organization. These are the yeasts , which belong among the ascomycetes, ...
Parasitology
... the planet, with representatives from all major taxa , from the simplest
unicellular organisms to complex vertebrates . Every free-living species has its ... is the study of those parasites which infect humans. These include
unicellular organisms such as Plasmodium spp., the organism which causes malaria ...
Prokaryote
... Prokaryotes are
unicellular (in rare cases, multicellular ) organisms without a nucleus . The name ... to eukaryotes , organisms that have cell nuclei and may be variously
unicellular or multicellular. The difference between the structure of prokaryotes and ...
Alga
... Some retain plastids, but not chloroplasts, while others have lost them entirely.
Forms of algae
Most of the simpler algae are
unicellular flagellates or amoeboids , but colonial and non-motile forms have developed independently among several of the groups. Some of the more common ...
Biology
... by means of multiple dynamic equilibrium adjustments controlled by interrelated regulation mechanisms. All living organisms , whether
unicellular or multicellular exhibit homeostasis. Homeostasis can manifest itself at the cellular level through the maintenance of a stable internal acidity ...
Cell division
... two daughter cells . This leads to growth in multicellular organisms (the growth of tissue ) and to procreation ( vegetative reproduction ) in
unicellular organisms .
Prokaryotic cells divide by binary fission . Eukaryotic cells usually undergo a process of nuclear division, called mitosis , ...
Cell growth
... plant hormones the cell wall can be remodeled, allowing for increases in cell size that are important for the growth of some plant tissues.
Most
unicellular organisms are microscopic in size, but there are some giant bacteria and protozoa that are visible to the naked eye. See: Table of cell sizes ...
Morphogenesis
... antennae. See images of this "antennapedia" mutant and others, at FlyBase .
The term morphogenesis can also be used to describe the development of
unicellular life forms that do not have an embryonic stage in their life cycle, or to refer to the evolution of a body structure within a taxonomic group . ...
Experimental evolution
...
One of the first to carry out a controlled evolution experiment was William Dallinger . In the late 19th century , he cultivated small
unicellular organisms in a custom-build incubator over a time period of seven years ( 1880 - 1886 ). Dallinger slowly increased the temperature of the incubator ...
Flagellum
... A flagellum (plural, flagella) is a whip-like organelle that many
unicellular organisms, and some multicellular ones, use to move about. They may also be involved in other processes. The name actually covers three different ...
Microbiology
... ~30 minutes for E. coli , but 12 to 24 hours for Mycobacterium tuberculosis )
Cells can easily survive in isolation from other cells
unicellular eukaryotes reproduce by mitotic division and prokaryotes by binary fission . This allows for the propagation of genetically identical ( ...
Microorganism
... it is microscopic (invisible to the naked eye). Microorganisms are often illustrated using single- celled , or unicellular, organisms; however, some
unicellular protists are visible to the naked eye, and some multicellular species are microscopic. The study of microorganisms is called microbiology .
...
Morphogenesis
... antennae. See images of this "antennapedia" mutant and others, at FlyBase .
The term morphogenesis can also be used to describe the development of
unicellular life forms that do not have an embryonic stage in their life cycle, or to refer to the evolution of a body structure within a taxonomic group . ...
Alga
... Some retain plastids, but not chloroplasts, while others have lost them entirely.
Forms of algae
Most of the simpler algae are
unicellular flagellates or amoeboids , but colonial and non-motile forms have developed independently among several of the groups. Some of the more common ...
Pseudopod
...
They are involved in a variety of cell activities, most notably:
Mechanical role
Pseudopods are one of the three locomotion modes of
unicellular organisms (together with flagella and cilia ).
Sensory role
Pseudopods also capture prey phagocytosis . Phagocytosis pseudopods have ...
Virus
... or alive?
A virus makes use of existing enzymes and other molecules of a host cell to create more virus particles. Viruses are neither
unicellular nor multicellular organisms ; they are somewhere between being living and non-living. Viruses have genes and show inheritance, but are reliant on ...