Scale is a proportion between two sets of measurements. For example, 1 centimeter on a map might represent 1 kilometer in actual distance. The diagram above on this page is a model of chromosomes,
DNA, and genes. Are all components of the model shown at the same scale? Explain your answer.

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.