Do 61. Which is not a way carbon can retum to the atmosphere?

Which of the following would most likely be key to gathering evidence that the rna world hypothesis is valid? creation of suitable environments for long-term study of single-celled organisms simulation of early earth conditions and long-term study of the resulting molecules development of a system for studying the microsphere's ability to absorb additional molecules categorization of the different specific conditions that result in the development of microspheres

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion