Explain how twain uses "tragedy" to achieve humor, whether through making fun of himself or others’ poor circumstances, using evidence from the text.

Alex determined that his average speed when he commuted to work is 35 miles per hour. what conversion factor can be used to convert this speed to feet per hour?

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

The graph shows the populations of two species over time. which type of symbiotic relationship does the graph represent? a. commensal b. mutualistic c. parasitic d. parent-offspring e. predator-prey