David Alercia in DefinitionABC

david alercia

Graduated in Biology from the National University of Córdoba, specialized in environmental management, and works in scientific tourism.

Main Articles

Another important function of the respiratory systems is to expel carbon dioxide, which is waste, out of the body. This gas goes the opposite way to oxygen. It reaches the respiratory surface through the circulatory system, and from there it passes into the air or water. This is the excretory function […]...

Frequently, the news about the extinction of a certain species appears before one, which means, neither more nor less, that that species disappeared forever. For organisms with asexual reproduction, which reproduce by mechanisms such as budding, the minimum number of individuals to ensure the survival of the species is 1; while […]...

The speciation process All the adaptive changes that occur through evolution leave their mark on the DNA of the species, and the changes accumulate after millennia of evolution. Speciation, like extinction, is measured on a geological time scale. At some point, these accumulated changes are […]...

We can recognize a cat, name it and identify our pet among other cats by its particular characteristics, such as the timbre of its meow or the color of its fur. We know the differences between a cat and a dog well, and we can even, without knowing anything about biology, differentiate a cat from other felines [...]...

These cycles allow the chemical elements essential for life, such as carbon (C), nitrogen (N), oxygen (O) and phosphorus (P) are recycled and remain available to organisms in the ecosystems. There are many more cycles, each chemical element that is circulating in an ecosystem has its own cycle, but […]...

Ecosystems are complex networks of relationships between all its components: living beings and elements of the physical environment. Ecosystems are not, as can sometimes be thought, collections of species that inhabit one place. determined, but rather the relationships established between them and with the physical environment that define […]...

Living beings do not live in isolation, in fact, none would survive alone: ​​they depend for their subsistence, as happens with the human being, on the existence of a series of natural resources (such as water) and the existence of other species (for example, carnivores depend on herbivores, and herbivores depend on floors). The […]...

To achieve its objective, biogeography relies on data from other sciences, especially geology, ecology and genetics; so it is an interdisciplinary science. It is one of the most traditional and ancient disciplines of biology. Biogeography is divided into two main branches: historical biogeography and […]...

Characteristics of insects Insects are characterized by having the body divided into three parts or segments: head, thorax and abdomen. In each of these segments they have jointed appendages that fulfill various functions. On their head they have a pair of antennae, a pair of eyes and mouthparts, which can be […]...

There are approximately 1.3 million known species of arthropods, representing more than 80% of all known animals. They inhabit all environments on Earth, from the sea to the air. Among the arthropods, the largest group is that of insects, which represent approximately 75% of the species of […]...

Authors at D.ABC

Augustine Repetto.
Degree in Psychology, graduated from the National University of Mar del Plata. Currently, a Postgraduate student in Human Sexuality: clinical and educational sexology based on the Gender and Human Rights Perspective.

Agueda Munoz Gerardo.
Degree in Physical Anthropology from the National School of Anthropology and History. Master in Anthropology from the National Autonomous University of Mexico. Currently, she is studying the PhD program in Anthropology at UNAM. Among his topics of interest are human migrations, genetic anthropology and indigenous peoples of Mexico.

Angel Zamora Ramirez.
Graduated in Physics from the University of Colima. Student of the Master's Degree in Biomedical Engineering and Physics at Cinvestav.

lilen gomez.
Professor in Philosophy, University of Buenos Aires, Argentina. Performance in the field of teaching and research, in areas of Contemporary Philosophy.

Pedro Gomez Molina.
Graduate in Environmental Sciences and Master in Geography from UNAM. He conducts research on historical mining, historical-GIS, and historical mapping.