Which of these is a component of the atmosphere? A-rock
B-oxygen
C-sediments
B-soil

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.