Bentos

The video tutorial introduces benthos, a community of plant and animal organisms living at the bottom of water bodies like oceans, lakes, and rivers. It explains the benthic ecosystem, highlighting how various organisms, including sea creatures like starfish and hermit crabs, inhabit this environment. The tutorial also covers marine sponges and anemones, emphasizing their unique characteristics. Additionally, it discusses the role of seagrasses in the benthic community, focusing on their need for light and nutrients. The video concludes by encouraging reflection on the importance of benthos in the food chain.

What is the primary habitat of benthos organisms?

• Coral reefs

• Bottom of water bodies

• Open ocean

• Surface of lakes

Which of the following is NOT a benthic organism?

• Starfish

• Hermit crab

• Dolphin

• Sea sponge

What unique feature do sea anemones have in their feeding process?

• They use photosynthesis

• They consume food that floats by

• They store food in shells

• They hunt in packs

Why do seagrasses grow in shallow waters?

• To anchor themselves better

• To receive enough light for photosynthesis

• To access more nutrients

• To avoid predators

How do seagrasses obtain the nutrients they need?

• Through their leaves and roots

• By absorbing from the water surface

• By trapping small fish

• Through symbiotic relationships with algae