The diagram below is an example of a blackberries → shrew → barn owl

What are four key elements of the study of economics?

What is the following best defines climate?

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.