Which of the following is a sign of illness in a dog?

Select all the true statements about the cosmic microwave background radiation

Which of the following is an advantage of solar energy?

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.