What kind of air would be characteristic of a maritime tropical air mass

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

What was the land like over 500 million years ago? what was under the sea?