B. mass extinction c. biodiversity hotspot

d. endangered species

a. endemic species

e. biotechnology

f. extinct species

g. exotic species

1. fire ants in southeastern United States

2. passenger pigeon

3. Florida panther

4. death of the dinosaurs

5. honeycreepers in Hawaiian Islands

6. Amazon rain forest

7. making chemicals or drugs from plants

links? do you have a link? i don't see anything?

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.