Q. With reference to Corals, which of the following statements are correct?
1.Corals are primarily vagile organisms, meaning they are capable of swimming freely throughout the ocean.
2.Corals have stinging tentacles that contain nematocysts used for prey capture.
3.Coral reefs are often associated with tropical and shallow waters.
Select the correct answer using the codes given below: :.
Statement 1 is incorrect. Corals are sessile organisms, meaning they are fixed in place and cannot move around. They are attached to the bottom of the ocean by a root-like structure called a holdfast.
Statements 2 and 3 are correct. Corals have stinging tentacles that contain nematocysts used for prey capture. Nematocysts are microscopic stinging capsules that are found in the tentacles of corals, sea anemones, jellyfish, and other cnidarians.
When coral polyp senses prey nearby, it fires its nematocysts. The nematocysts release a barb that pierces the prey’s skin and injects a venom. The venom paralyzes the prey, making it easy for the coral polyp to ingest.
Corals use their nematocysts to capture a variety of prey, including zooplankton, small fish, and crustaceans. Corals also use their nematocysts to defend themselves from predators.
Coral reefs form in warm, shallow waters that are rich in sunlight and nutrients. Coral reefs are found in many parts of the world, but they are most common in the tropics.
Some of the largest and most famous coral reefs in the world include the Great Barrier Reef in Australia, the Mesoamerican Barrier Reef System in Central America, and the Raja Ampat Islands in Indonesia.
Coral reefs are important ecosystems that provide habitat for a wide variety of marine life. They also protect coastlines from erosion and storms. However, coral reefs are threatened by climate change, pollution, and overfishing.
Source: ForumIAS
