Dust particles are natural in the environment but when they combine with vehicle emission particles they form a particulate matter
b. ultrafine particles
c. reactive chemicals
d. inactive chemicals
e. lead particles

Which of the following is not an example of conflict between related individuals?

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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.