Which statement best explains why water is essential for all living things? water makes up 65% of human beings. water is an essential component of blood. water covers 75% of earth’s surface. water is necessary for cellular functions.

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.