Direction: Choose and encircle the letter of the best answer
1. Which group of organisms can be found in the mangrove ecosystem?
A. mussels, fish, corals
B. worm, rat, fish
C. butterfly, snake, bird
D. mangrove trees, fiddler crab, fish
2. 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
3. Which of the following describes a canopy of the rainforest?
A. composed of trees that are 130 to 180 feet tall
B. about 59feet and consists of trunk of canopy, shrubs, small plants and trees
C. consists mostly of fungi
, insects, worms and litter from taller trees
D. has slender trees from a dense platform of vegetation with 60 to 129 feet.
4. What kind of interaction is shown when one organism kills another organism for food?
A mutualism
B. commensalism
C. parasitism
D. predation
5. It is an environment where both living and non-living things exist and interact with one another.
A. ecology
B. ecosystem C. community
D. population
6. One example of competition in tropical rainforest is when the shrubs and trees are growing together in one area.
What do they compete for?
A. sunlight and soil nutrients.
B. oxygen and carbon dioxide,
C. chemicals and oxygen
D. water and chemicals.
7. results from the interconnected food chains.
A. consumer
B. producer
C. food web
D. biotic component
8. Why is the relationship between the corals and the algae in the coral reefs considered mutualistic?
A. The corals benefit in the interaction and not the algae.
B. The corals receive oxygen from algae, the algae get protection from corals.
C. The corals receive oxygen from algae while the algae are harmed.
D. The corals and algae live together without harming each other.
9. What kind of interaction is shown when animals like crabs and mollusks help break down plant litter in a
mangrove ecosystem through grazing?
A competition B. commensalism
C. parasitism
D. mutualism
10. Why is producer important in an ecosystem?
A. It is the source of food to the consumers.
B. It is an organism that eats plants.
C. It breaks down organism into smaller particles.
D. It is a series of feeding relationship.​