What is the summary of the section "We Need Better Batteries"?

Why are fossils of organism's from the phanerozoic eon much more likely to be found than fossils of organisms from any other eon? a. more organisms present during the phanerozoic eon had soft body parts. b. organisms present during the phanerozoic eon were all microscopic. c. more organisms present during the phanerozoic eon had hard body parts. d. organisms present during the phanerozoic eon are the most ancient life forms.

In a command economy, the majority of goods and services are provided by the

The dashed segment of the plotted experiment in the graph in the lesson is called an