Recent Submissions

  • Clasificación del Reino Animal 

    Guerrero Rodríguez, Windy Jacqueline (2017-09-01)
    Generally the animal kingdom has been classified into two large groups: vertebrates and invertebrates, however this classification does not respond to an evolutionary criterion because not all invertebrates have a recent ...
  • Animales invertebrados 

    Medrano Gauna, Eva María (2017-01-01)
    Animals are a group of multicellular, eukaryotic, heterotrophic organisms. Most of them are mobile and reproduce sexually. It is one of the kingdoms with the greatest evolution, it describes more than a million species, ...
  • Manifestaciones de los seres vivos 

    Islas Vargas, Leticia (2016-07-01)
    Generalmente resulta complicado definir el concepto de vida, dada la gran variedad de formas, tamaños, colores, hábitats, etc. que tienen los seres vivos. Una excelente forma de hacerlo, es describiendo el conjunto de ...
  • Generalidades de la Ecología 

    Unknown author (2011)
  • Vitaminas 

    Vivas Gil, Silvia (2011)