Dato curioso sobre el el diagrama de orbitales

Explain the importance of producers, primary consumers, secondary consumers and decomposers in an ecosystem.

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?