The change in life-forms in the fossil record from less complex organisms to more complex organisms over time is best explained by

(1) extinction
(2) evolution
(3) dynamic equilibrium
(4) original horizontality

[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a. light in water b. light in vacuum c. sound in air. d. sound in water

Fertility and mortality rates are higher in more developed nations.

What are some of the impacts of humans on the earth?