Pertanyaan

Sea anemones are stinging polyps that spend most of their time attached to rocks on the sea bottom or on coral reefs. They are waiting for fish to pass close enough to get ensnared in their venom-filled tentacles. There are more than 1,000 sea anemone species found throughout the world's oceans at various depths, although the largest and most varied occur in coastal tropical waters. They run the full spectrum of colors and can be as small as half an inch (1.25 centimeters) or as large as 6 feet (1.8 meters) across. Their bodies are composed of an adhesive pedal disc, or foot, a cylindrical body, and an array of tentacles surrounding a central mouth. The tentacles are triggered by the slightest touch, firing a harpoon-like filament into their victim and injecting a paralyzing neurotoxin. The helpless prey is then guided into the mouth by the tentacles. Several sea anemones establish symbiotic relationships with green algae. The sea anemones provide safe harbor and exposure to sunlight for the algae and the anemone receives oxygen and sugar, the bi-products of the algae's photosynthesis. They form another, more famous symbiotic alliance with clown fish, which are protected by a mucus layer that makes them immune to the anemone's sting. Clown fish live within the anemone's tentacles, getting protection from predators, and the anemone snacks on the scraps from the clown fish's meals. Where do sea anemones live? A. On the sand on the seabed B. On the rock on the seashore C. On the beach D. On coral reef

Ikuti Tryout SNBT & Menangkan E-Wallet 100rb

Habis dalam

01

:

19

:

33

:

10

Klaim