5. Which organisms show commensalism? A Fish living on coral B. Barnacle living on a whale C. Sea urchin eating corals D. Clownfish living on sea anemone
6.Where are mangrove swamps located? A. along arctic coastlines B. along temperate coastlines C. along rocky coastlines D. along tropical ang subtropical coastline
7. Mangroves are important for all these things except _____ A. slowing coastal erosion B. making coastal erosion worse C. sheltering many animals. D. protecting coastal from storm surges
8. Which is considered as the resident species in the mangrove swamp ecosystem? A. Fish B. egret C. oyster D. monitor lizard
9. Why do mangrove plants can survive in brackish water while the other plants cannot? A. Mangrove have strong trunk and roots. B.Mangrove have roots exposed to above water C. Mangrove are adapted to filter seawater. D. Mangroves have roots that can filter saltwater
10. What is the role of crustaceans like crabs I the mangrove ecosystem? A They attach themselves to the roots of mangroves. B. They serve as food of other animals. C. They help break down leaf litter through grazing. D. They find food in the mud.
