Energy is produced in the cores of main sequence stars when? A) lighter elements undergo fusion into heavier elements

B) heavier elements undergo fusion into lighter elements

C) cosmic background radiation is absorbed

D) cosmic background radiation is released

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

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

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.