What I Know
Choose the letter of the best answer. Write the chosen letter on a separate sheet of paper.

1. What are the things needed by plants to make their own food?
A. water, chemicals and oxygen
B. oxygen and carbon dioxide
C. oxygen and chemicals
D. carbon dioxide, soil and sunlight

2. What kind of interaction is shown when worms live in the guts and flesh of a fish?
A. mutualism C. predation
B. commensalism D. parasitism

3. What kind of interaction is shown when monkeys in tropical rainforest compete for food with other animals?
A. mutualism C. competition
B. commensalism D. parasitism

4. A reef that stands between the open sea and a lagoon.
A. Barrier Reefs C. Coral Reefs
B. Fringing Reefs D. Coral Atolls

5. Why is there a need to protect and conserve the mangrove swamp ecosystem?
A. It is home to animals like jaguar, monkey and owl.
B. It serves as breeding or nesting grounds of fishes.
C. It protects sea animals like sponges, mollusks and crustaceans.
D. It provides livelihood to the farmers.​