Match the sphere with its correct description. 1. lithosphere land 2. atmosphere sky/air 3. biosphere life 4. hydrosphere water

Aeukaryotic cell must be from a plant if the cell a) a nucleus b) a nuclear envelope c) cytoplasm d) a cell wall

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

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food