Category: Biology

10 Foreign Animals Of Peru And Their Characteristics

The foreign animals of Peru are species originating from other countries that man has introduced to that nation. The impact on the local, regional or national ecology of these new species is variable. Some species could contribute, among other things, to pest control, being considered highly beneficial as they represent a natural alternative to chemical

Fauna Of Puno: Most Representative Species

The fauna of Puno is part of the biodiversity found in Peru. Due to its unique geographic characteristics, there are a large number of native species in the region. It should be noted that within the department of Puno is Lake Titicaca, an aquifer extension whose interior and surroundings are home to fauna and flora

Histochemistry: Rationale, Processing, Staining

The histochemical is a useful tool in the study of the morphology of various biological tissues (plants and animals) due to its reaction principle of tissue components such as carbohydrates, lipids and proteins, among others, chemical dyes. This valuable tool allows not only to identify the composition and structure of tissues and cells, but also

Heterosporia: Processing And Reproduction

The heterospory  is the development of spores of two different sizes and sexes, in esporofitos of land plants with seeds, as well as in certain mosses and ferns. The smallest spore is the microspore and is male, the largest spore is the megaspore and is female. Heterosporia appears as an evolutionary sign in some plant

Spermiogenesis: Phases And Their Characteristics

The spermatogenesis , spermatic also known as metamorphosis, corresponds to the transformation process spermatids (or spermatids) in mature spermatozoa. This phase occurs when spermatids are attached to Sertoli cells. In contrast, the term spermatogenesis refers to the production of haploid spermatozoa (23 chromosomes) from undifferentiated and diploid spermatogonia (46 chromosomes). The spermatids of a mammal