Which best describes why scientists need to be creative? A. They need to be sure that the evidence backs up the conclusion. B. They need to notice all of the evidence carefully. C. They need to be constantly asking questions. D. They need to think of ways to solve problems?

How can you tell the difference between rough er from smooth er?

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

Adistinctive characteristic of mammals that is not observed in other vertebrates is