Question

Which of the following is the largest mollusc is the largest invertebrate?
A) Giant clam
B) Giant snail
C) Giant squid
D) Giant octopus

Answer 1

Molluscs is the second-largest animal phylum. If we talk about the largest invertebrate it belongs to the family Architeuthidae. It can grow to a height of about 10-13 m.

Complete answer:
Molluscs being the second largest phylum are found on land as well as in water. They are mainly triploblastic, laterally symmetrical and coelomate animals. The body of these animals are usually covered by a distinct calcareous shell and is segmented into head, muscular foot and visceral hump.

A) Giant squid is the largest invertebrate mollusc. These species are deep ocean dwelling belonging to the family Architeuthidae. They are gigantic and can grow up to 12-13 m females and 10 m as males.
B) Giant clam- It is the largest living bivalve mollusc and weighs around 200kg. The length of the giant clam is 120cm.
C) Giant Snail- It is also known as a giant African land snail. The length is around 20 cm. It belongs to the family Achatinidae.
D) Giant Octopus- The largest octopus is around 30 feet in length. It is found in the Pacific ocean.

Thus the correct answer is option ‘C’.

Additional Information: The head of the squid contains large eyes about 1 foot in diameter. These eyes absorb more light than their smaller parts can. The squid has a complex brain that is doughnut-shaped. The main part of the body contains all the body parts. Pumping of blood helps in the exchange of fluid, expel, excrete and many other activities in blood.
CLASSIFICATION-
kingdom - Animalia
Phylum- Mollusca
Class - Cephalopods
Order- Oegopsida
Family- Architeuthidae

Note: The term ecosystem was given by A.G Tansley .
- The Father of the ecosystem is O.P Odum.
- Producers, herbivores, carnivores and decomposers are present in all types of ecosystem.
- All the insectivorous plant plays a double role as producers and consumers.