Question

In Cephalopods
A)Head is fused with the foot.
B)Head is fused with the thorax.
C)Foot is located on the head.
D)Head is located on foot.

Answer 1

Hint: The second species-rich phylum in the world after the arthropods is the mollusk. It includes different groups of animals on the planet. Around 50,000 living species are included in this phylum. Snails, octopus, squid, oysters, chitons are some of the familiar organisms of this phylum.

Complete answer:
-A small group of highly advanced and organized marine animals can be found in the phylum Mollusca. The octopus, Cuttlefish, squid are some of the family organisms that can be seen in this phylum.
-All the cephalopods are specifically a type of Mollusca or we can say that the advanced of all mollusks. They have the largest brain of the order invertebrates and are considered the most intelligence of any mollusk.
-Cephalopods in Greek means "head foot" as the foot of the animals is around the head. They generally lack traditional feet instead they have 8 and 10 tentacles attached to their head. The tentacles are covered with many suction cups or hooks which are used for capturing prey.
-Some of the modern cephalopods keep their shell inside of their bodies. Such as Cuttlefish and squid. The nautilus is only the modern cephalopods that have an external shell.

Additional Information: -The cells of the cephalopods are of different varieties. They can be long and straight looking like a cigar.
-Sometimes they can be spiraled remaining in the same plane of symmetry.
-The shells of cephalopods can be easily mistaken by the gastropods. The cephalopods have a chambered shell and have many internal partitions inside of their shells whereas the shells of the gastropods are unchambered.
-The cephalopods are very important to humans because they are taken as a food source, provide jewelry tools, and even used as pets.
-This creature can occur in every habitat found on the earth.

So, the correct answer is,” Foot is located on the head”

Note: -Cephalopods have a soft body having a head and a foot. Their bodies are covered by a hard exoskeleton like snails' bodies are covered with the shells or the plate of Chitons.
-The body of the cephalopods has a head, foot, and a visceral mass and all this is covered with a mantle that secretes the shell.
-In octopus and Slugs, the mantle is lost while it is used for other activities in other animals such as respiration.