Which of the following has the most primitive respiratory system? A. Insect
B. Fish
C. Snail
D. Mouse​

Which of these statements are true about scientific theories and hypothesis

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.

What best describes lactic acid fermentation?