What is one difference between primary and secondary succession

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.

Models are non-visual ways of coummincating how someone thinks about something in the natural world

Which organelle breaks down sugar molecules that supply energy to the cell ?