Ordena de uno a seis, según el orden cronológico en el que se presentaron los siguientes eventos. aparición de la vida
aparición de los eucariotas
creación de la tierra
aparición de metabolismo aerobio
aparición de la fotosíntesis
primeras bacterias heterótrofas anaerobias.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

What is the name of the type of cell division that occurs in the prokaryotic cell cycle

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla