Upward Development - Definition and Features

Higher Development in Evolution - Concept and Definitions

• The concept of higher development describes an evolutionary advance for which there are examples in both the plant and animal kingdoms. An organism that has changed or changed from its predecessor in evolutionary history is considered to be higher development. differentiates differentiated property, which secures him survival advantages and insofar means an evolutionary progress.
• It is disputed to what extent the definition of a higher development as progress is actually applicable. The influence of accidental genetic changes and that of changes in the environment on you Higher development is given as counter-arguments that there is no strict linear, evolutionary progression suspect or not to make a rating, but to provide a description instead.

Examples and definitions of higher development

• The evolutionary development or anagenesis describes the occurrence of increasingly complex forms of life. Paleontological finds confirm this, which has been reconstructed or reconstructed by science so far. developed concept of evolution through the geo-historical stratification of the finds. The younger the layers in which fossils are found, the more complex are the remains of the organisms found in them.
• Paleontological finds would result in the following sequence of anagenesis or Represent higher development: After the bacteria, protozoa emerged, then sponges, followed by cnidarians. Later finds document so-called metazoa, animals that have a rope ladder nervous system, followed by fish, reptiles and birds. The most recent finds are from mammals and finally from primates. The geological stratification of the fossils provides a plausible explanation for the theory of descent.
• In the case of plants, certain families of green algae are a popular example that can be used to illustrate the definition of a higher development. First of all, in unicellular algae such as Chlamydomonas, all cell functions must take place in one cell. This is therefore with regard to their Functions quite inflexible. The algae reproduce through cell division into absolutely identical parts, which means a low genetic diversity. Younger algae forms such as gonium, although they consist of single cells, combine to form colonies that implement common metabolic aspects through a gelatinous shell (external protection).


Bridging animals - discuss the theory of evolution

In biology, bridging animals are defined as animals in which they have characteristics of two ...

• In contrast, the Volvox spherical algae has further differentiated cells, which, for example, also supply undersupplied cells with food. Furthermore, the cells have further specialized, for example divided into body and reproductive cells.