The gas exchange surfaces in a mammalian lung are organized into structures that look like clusters of hollow grapes. the hollow, grape-like structures are

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Pls quickly! which of the following is true about the behavior of an organism? a. the behavior of an organism is influenced by both its heredity and it’s environment. b. the behavior of an organism is influenced only by the treats it inherits from its parents. c. the behavior of an organism is influenced only by the environment in which it lives in. d. the behavior of an organism is not influenced by either it’s heredity or its environment.

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million