EukaryoteDomain of life whose cells have nucleiThe eukaryotes () are cellularorganisms of the domainEukaryota or Eukarya, which have a distinct cell nucleus (formed by a nuclear membrane), membrane-bound organelles and organization supported by a cytoskeleton. Extant eukaryotes are traditionally grouped into four kingdoms: animals, plants, fungi and protists.
AnimalBiological kingdomAnimals are multicellular, eukaryoticorganisms belonging to the biologicalkingdomAnimalia (). Animals consume organic material, breathe oxygen, have muscle cells, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development. With few exceptions, animals are able to move. Animals form a clade, meaning that they arose from a single common ancestor.
Unicellular organismUnicellular organisms, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Organisms fall into two general categories: prokaryotic organisms and eukaryotic organisms. Most prokaryotes are unicellular and are classified into bacteria and archaea. Many eukaryotes are multicellular, but some are unicellular such as protozoa, unicellular algae, and unicellular fungi.
MicroorganismMicroscopic living organismA cluster of Escherichia coli bacteria magnified 10,000 timesA microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from antiquity, with an early attestation in Jain literature authored in 6th-century BC India.
AlgaeAlgae ( AL-jee, UK also AL-ghee; sing.: alga ) are any of a large and diverse group of photosynthetic organisms. It excludes the land plants (embryophytes). Such organisms range from microscopic unicellular microalgae (including cyanobacteria and phytoplankton) to seaweeds, multicellular macroalgae which may grow up to 50 metres (160 ft) in length. Most algae are aquatic (especially marine), and some form cohesive colonies.
Cell wallA cell wall is a structural layer that surrounds some cell types, found immediately outside the cell membrane. It can be tough, flexible, and sometimes rigid. Primarily, it provides the cell with structural support, shape, protection, and functions as a selective barrier. Another vital role of the cell wall is to help the cell withstand osmotic pressure and mechanical stress. Cell walls are found in most prokaryotes, with the exception of mollicute bacteria.
Georg August GoldfussGeorg August Goldfuß (18 April 1782 – 2 October 1848) was a Germanpalaeontologist, zoologist and botanist. He became a professor of zoology at the University of Erlangen and later at the University of Bonn. He coined the terms "protozoa" and "pelecypoda". Life and workGoldfuß was born at Thurnau near Bayreuth. His father, a court physician, Johann August Goldfuß (1748–85) died in an accident on a voyage to the East Indies.
MotilityMotility is the ability of an organism to move independently by using metabolic energy.
ParasitismParasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life.
PredationPredation is a biological interaction in which one organism, the predator, kills and eats another organism, its prey. The predator-prey relationship is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill the host) and parasitoidism (which always does, eventually).
PolyphylyA polyphyletic group is an assemblage that includes organisms with mixed evolutionary origin but does not include their most recent common ancestor. The term is often applied to groups that share similar features known as homoplasies, which are explained as a result of convergent evolution. It is contrasted with monophyly and paraphyly.
Class (taxonomy)In biological taxonomy, class (Latin: classis) is a taxonomic rank, as well as a taxonomic unit (i.e., a taxon) in that rank. It is a group of related taxonomic orders. Other well-known ranks in descending order of size are domain, kingdom, phylum, order, family, genus, and species, with class ranking between phylum and order.
ur-Related word or term.ThierRelated word or term.tectologyRelated word or term.*As an Amazon Associate I earn from qualifying purchases.