Exercise 3.1B: Aquatic Diversity

Complete the five Check and Reflect questions found on page 380.
1. Give 4 examples of why there is more diversity of living things in saltwater than in freshwater.
2. Describe three characteristics that enable fish to live in aquatic environments?
3. Some water plants thrive in our lakes. Every summer they grow up but every winter they die back.
How have they adapted to seasonal changes in their environment?
4. What might happen to the fish in a lake if a factory continually discharged a large amount of warm water in to the lake?
5. Select what you feel is the most interesting factor aquatic organisms have to adapt to and explain why it is the most interesting.