In a population of goldfish, individuals can be colored orange, white, white with orange spots, orange with black spots, and orange with white spots. What is the best explanation for these
color differences?

What is the farthest destination to date for a human spaceflight mission?

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.