8. Los animales invertebrados tienen dos tipos de reproducción, asexual y sexual. Cuando hablamos de reproducción asexual se quiere decir que se da sólo en animales cuyas células no están muy diferenciadas, tales como esponjas, hidras, planarias, lombrices de tierra y estrellas de mar; éstos animales no presentan variabilidad genética ¿Por qué? * 5 puntos
No hay células sexuales idénticas.
Generan muchos organismos en poco tiempo.
No hay cuidado parental.
Cualquier parte del cuerpo genera otro ser vivo.

is in the form atp or adenosine triphosphate

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

answer(isometric);