Which gas was most likely not present in creating the amino acids of early Earth's waters of the past? ammonia
sulfur
hydrogen
nitrogen

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.

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin