What is one abiotic factor that differs between polar and alpine tundras? Ball

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.

Asap what occurs after cytokinesis is completed at the end of meiosis 1?

20 the compound al(nh3)2 has atoms of nitrogen.