4.2 Different Ecosystems

What is the main characteristic of mangrove trees?

• They have long, thin leaves

• They can grow in salty water

• They produce colorful flowers

• They have deep root systems

Why are mangrove forests important for young fish?

• They provide food

• They offer protection from predators

• They help regulate water temperature

• They provide a place to lay eggs

What happens to the fallen mangrove leaves?

• They are washed away by the tide

• They are eaten by birds

• They are decomposed by bacteria

• They are used to build nests

Which animal feeds on crabs in the mangrove forest?

• Mudskipper

• Crab-eating macaque

• Prawn

• Young fish

What is the ecological role of mangrove forests?

• To provide timber for construction

• To protect coastal areas from erosion

• To attract tourists

• To produce oxygen

What happens to the seawater in the Arctic Ocean during winter?

• It evaporates

• It freezes

• It becomes warmer

• It turns into gas

What is the main food source for polar bears?

• Fish

• Seals

• Arctic foxes

• Algae

How do polar bears move between ice floes?

• They jump

• They fly

• They swim

• They use ice bridges

What organisms grow on the underside of the ice floes?

• Fish

• Shrimp-like organisms

• Seals

• Algae

What is the food chain in the Arctic Ocean?

• Algae→Shrimp-like organisms→Fish→Seals→Polar bears

• Polar bears→Seals→Fish→Shrimp-like organisms→Algae

• Seals→Polar bears→Algae→Shrimp-like organisms→Fish

• Fish→Seals→Polar bears→Algae→Shrimp-like organisms