Benthos

The video tutorial introduces benthos, a community of organisms living at the bottom of water bodies. It explains the benthic ecosystem, highlighting various organisms like sea creatures and plants that inhabit this environment. The tutorial provides examples of marine benthic animals such as starfish, hermit crabs, sea sponges, and anemones, and discusses benthic plants like seagrasses, which require light for photosynthesis. Finally, it emphasizes the importance of benthos in the food chain.

What is the primary habitat of benthos?

• The shore of a lake

• The middle of a river

• The bottom of water bodies

• The surface of the ocean

Which of the following is NOT a benthic organism?

• Sea sponge

• Hermit crab

• Starfish

• Dolphin

How do benthic organisms typically find their food?

• By hunting in packs

• By catching prey in the open water

• By photosynthesis

• By scavenging on the ocean floor

What is a key requirement for the growth of seagrasses?

• Deep ocean waters

• Cold temperatures

• Light for photosynthesis

• High salinity

Why are seagrasses typically found in shallow waters?

• They need high pressure to thrive

• They need to avoid predators

• They require light for photosynthesis

• They grow better in cold water