In humans, the effect of the hormone calcitonin is to in humans, the effect of the hormone calcitonin is to decrease mitosis of chondrocytes at the epiphyseal plate increase blood calcium levels by stimulating osteoclasts temporarily decrease blood calcium levels when administered in large doses increase blood calcium levels by inhibiting osteoblasts

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.