Examples of heterotrophic plants

Ejemplos de eubacterias

El nombre proviene de las raíces griegas πρώτο (proto), primitivo, y ζώο[ν] (zoo[n]), animal. Tradicionalmente se dividían los seres vivos en animales y vexetais y los protozoos eran las formas más sinxelas consideradas animales (y los protófitos eran los microorganismos considerados vexetais). Haeckel propuso más tarde el reino Protista, que dividió en Protozoos, Protófitos y protistas atípicos. De todas formas, muchos tratados posteriores a Haeckel siguieron clasificando a los seres vivos en animales y vexetais, y consideraban a los protozoos un grupo de organismos únicos dentro del reino animal.

Una clasificación tradicional muy utilizada hasta hace poco tiempo y que aparece en muchos libros de Zoología, elaborada por Honigberg & col. (1964)[2], trataba a los protozoos como un único filo dividido en cuatro clases basadas sobre todo en el modo de locomoción. Debido a que todas estas formas se desarrollan por evolución convergente, las clases son en realidad complejos grupos polifiléticos:

Linné, en su Systema Naturae, dividió a los seres vivos en dos reinos, animal y vexetal, a los que logo sumou un reino mineral (Lapides). Siguieron así los conceptos aristotélicos de la división de la naturaleza. Con la invención del microscopio, en el siglo XVII, fue posible examinar las formas más pequeñas de vida, y fue así como Antoni van Leeuwenhoek descubrió los protozoos en auga de chuvia, de estanque, o heces y chamounos animálculos.

Examples of archaea

In the past, archaea were classified as bacteria, as prokaryotes, framed in the ancient kingdom Monera and were called archaeobacteria, but this classification was no longer used. In reality, archaea have an independent evolutionary history and show many differences in their biochemistry from other life forms, so they were classified in a separate domain.

The relationship between the three domains is of great importance for understanding the origin of life. Most of the metabolic pathways, which involve most of the genes in an organism, are common between archaea and bacteria, and most of the genes involved in genome expression are common between archaea and eukaryotes. In prokaryotes, the membrane structure of archaea is very similar to Gram-positive bacteria, mainly because both have a lipid bilayer. In phylogenetic trees based on the sequences of different genes/proteins of prokaryotic homologs, the homologs of archaea are closer to those of Gram-positive bacteria.

Differences between bacteria and archaea

) and water to form oxygen and complex organic compounds, mainly through the process of photosynthesis (green arrow). Both types of organisms use such compounds via cellular respiration to generate ATP and again form

A heterotroph (from Greek ἕτερος héteros = 'other', and trophe = 'nutrition') is an organism that cannot produce its own food, but is nourished by other sources of organic carbon, mainly plant or animal matter. In the food chain, heterotrophs are primary, secondary and tertiary consumers, but not producers.[1][2] Living organisms that are heterotrophs include all animals and fungi, some bacteria and protists,[3] and many parasitic plants. The term heterotroph emerged in microbiology in 1946 as part of a classification of microorganisms based on their type of nutrition.[4] The term is now used in many fields, such as ecology, to describe the food chain.

Heterotrophs represent one of two mechanisms of nutrition (trophic levels), the other being autotrophs. Autotrophs use energy from sunlight (photoautotrophs) or oxidation of inorganic compounds (lithoautotrophs) to convert inorganic carbon dioxide into organic carbon compounds and energy to sustain their life. Comparing the two in basic terms, heterotrophs (such as animals) eat autotrophs (such as plants) or other heterotrophs, or both.

Heterotrophic nutrition

Mexico has an area of 1,964,375 km2 which represents 1.47% of the planetary surface and possesses close to 10% of the total known species, coexisting in it between 10 - 15% of the wild species of the planet.

Mexico has an extension of 1,964,375 km2 which represents 1.47% of the planetary surface and possesses about 10% of the total known species, occupying the 4th place among the megadiverse countries, 5th in diversity of plant species, 3rd in mammals, 2nd in reptiles, 26th in timber production, coexisting in it between 10 - 15% of wild species of the planet.

For a better understanding in this first installment, only the order Artiodactyla to Didelphimorphia will be covered. On the other hand, the order Cetacea* and Sirenia*; the families Otariidae and Phocidae can be found in the Blog: Marine Mammals in Mexico.

In Mexico, the order includes four families: the wild boar, deer, pronghorn and bighorn sheep. Cattle, goats, domestic sheep and pigs belong to this order, but were introduced to the country when European man colonized it.