How do scientists study pollen grains to help them understand climate change?
by analyzing and making inferences about them,
by observing and listing facts about them,
by studying and reading more about them,
by inspecting them and sharing findings with other scientists

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.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary