Question

Animal species that are threatened by extinction are primarily in the phylum ________.

Answer 1

The answer is 'Mollusca'. This is a large phylum of invertebrate animals. There are around 85,000 recorded currently living species of molluscs, and an estimated 60,000 and 100,000 additional species in the fossil record.

Molluscs comprise the largest marine phylum, but are also found in freshwater and terrestrial habitats. Molluscs are highly diverse in size, anatomical structure, behaviour and habitat choice. The most advanced Molluscs are the Cephalopods, such as squid, cuttlefish and octopus. The gastropods are the snails and slugs and are most numerous in species.

Answer 2

The answer is Mollusca. The three main body parts Muscular foot, a visceral mass, and a mantle. Mollusca are mostly found in fresh water and marine environment, and because of loss of habitat is the reason why there is an extinct, so it must be preserved and protect the habitat.