67. Which of the following statements are true with respect to corals?
1. corals exhibit a symbiotic relationship with algae zooxanthellae
2. Among different species of corals , the tropical corals are the most abundant
Options:
67. Which of the following statements are true with respect to corals?
1. corals exhibit a symbiotic relationship with algae zooxanthellae
2. Among different species of corals , the tropical corals are the most abundant
Options:
The correct option is A a. 1 only
a)
Cold-water corals extend to deeper, darker parts of the oceans than tropical corals, ranging from near the surface to the abyss, beyond 2,000 metres where water temperatures may be as cold as 4 °C. They inhabit deep water, not shallow water. Like tropical corals, they provide habitat to other species, but deep-watercorals do not require zooxanthellae to survive
United Nations Environment Programme reports that there are more cold water coral reefs worldwide than tropical reefs. Their extent is much larger than their tropical counterpart. Some, as the various individual reefs stretching from Norway as far south as West Africa, are when combined far bigger than more famous tropical ones such as Australia‟s Great Barrier Reef
a. 1 only
a)
Cold-water corals extend to deeper, darker parts of the oceans than tropical corals, ranging from near the surface to the abyss, beyond 2,000 metres where water temperatures may be as cold as 4 °C. They inhabit deep water, not shallow water. Like tropical corals, they provide habitat to other species, but deep-watercorals do not require zooxanthellae to survive
United Nations Environment Programme reports that there are more cold water coral reefs worldwide than tropical reefs. Their extent is much larger than their tropical counterpart. Some, as the various individual reefs stretching from Norway as far south as West Africa, are when combined far bigger than more famous tropical ones such as Australia‟s Great Barrier Reef
