"Gravity doesn't care whether you believe in it or not," she said, "but if you step off a cliff, you're going to go down."

What point is Dr. Hayhoe trying to illustrate?

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

If a cell is placed into a hypertonic environment,what will happen to it ? a)it will shrink or shrivel b)nothing c)it will burst d) it will expand or enlarge

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.