44. (A)cooperation (B) collaboration (C) preoccupation (D) presupposition

51. Which statement of the four naturalists mentioned in the passage is NOT correct? (A) Darwin wrote “On the Origin of Species.” (B) Wallace embraced the idea of evolution by natural selection. (C) Bates stayed in the Amazon for the longest time among the four. (D) Müller discovered how butterflies generated their wing color patterns.