3. Identify the source of alpha particle in Rutherford scattering experiment? a. Hydrogen Nucleus b. Argon Nucleus c. Helium Nucleus d. None of these

4. is not a green house gas.

a. Methane b. Carbon-dioxide c. Helium Nucleus d. None of these

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

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.