Using a water bottle as our topic, describe how changing the type of water bottle fits into the four areas of sustainability: Environment, Culture, Politics, and Economics.

The image shows embryos of three vertebrate classes

Why do mutations in genes affect traits? o a. genes determine what type of mutagens an organism has. o b. genes produce proteins that cause traits. o c. genes affect how many chromosomes an organism has o d. genes code for carbohydrates that influence traits.

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