Fossil fuels come from a. living plants and animals. c. soil. b. atomic reactions. d. remains of dead organisms. select the best answer from the choices provided a b c d

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

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.

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.