Scientists have discovered by looking at fossil records that the ancestors of flying squirrels did not have flight membranes and are very similar to tree squirrels today. Make a hypothesis about how flight membranes evolved in flying squirrels through the process of natural selection.

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Match each description to the level of organization