THE DEEP VIDEO

The following questions are to be answered while viewing the video entitled The Deep, a segment of The Blue Planet: Seas of Life series produced by the BBC (2001, 2007). Most answers can be expressed in a sentence or less. Your completed lab can be submitted as an e-mail attachment.

1. What good is sight in the Twilight Zone?

Darkness, predators and a lot of transparent animals.

2. Can Dark Zone inhabitants really eat things as big as they are?

3. Who is a bloodsucker for life in exchange for providing a steady supply of sperm?

4. What good is bioluminescence in the Dark Zone?

5. What does the sun trigger in The Deep?

6. Describe marine snow.

7.  Why are sea urchins among the most abundant animals on Earth?

8.  What happens when whales die?

9.  What covers half of Earth?

10.  How well know is this half of Earth?

11.  Where do Hot Vent communities get their energy?

12.  Where do Cold Seep communities get their energy?

13.  Imagine yourself descending beneath the waves to a depth of 100 meters-that's about the length of a football field, with end zones. You have entered what this video calls the "Dark Zone". From here to the bottom is 99 percent of all the living space on Earth. Briefly describe this habitat with the help of the following items from your textbook: Table 4.4 (122), Figure 7.2 (183), and the section labeled "The Effect of Pressure" (118).