I'm what sphere do chemicals have the shortest residence tome

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.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

How does the human body lever work?