Which component is missing from the cellular respiration? + Oxygen -> Carbon Dioxide + Water + Energy

(A) Sunlight
(B) Sugar
(C) Oxygen
(D) Carbon

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 are some possible short and long term medical concerns for crew members on longer space exploration trips

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above