David Gallo: Deep ocean mysteries and wonders 1. At the time this video was filmed (2007), what was Gallo's estimate of the percentage of earth's
oceans that had been investigated? How might this impact not only how we view the oceans, tides, and the entire marine ecosystem, but also the world and climate in general?
2. Just as the unit describes many amazing ecosystem creatures, Gallo also shares some
incredible species that were observed at the bottom of the ocean. Briefly describe several of the
creatures or discoveries discussed and what makes them so interesting.

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

Sea levels are rising due to climate change while increasing numbers of people are moving into coastal areas. to accommodate more people, there has been increased construction of beachfront resorts and condominiums. how is this impacting sea turtle numbers and biodiversity and why? a. the increased human population in coastal areas has meant that more food is available to the turtles (e.g., dropped food, waste from restaurants), which has led to an increase in the numbers and diversity of sea turtles. b. there has been very little change in the numbers and biodiversity of sea turtles because the planet is so vast that they can simply relocate to less crowded beaches. c. this has resulted in a decrease in numbers and diversity of sea turtles because it is restricting available nesting sites, and hence reproduction. d. this has resulted in an increase in numbers and diversity of sea turtles because people are around to protect them from natural predators.

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom