Explain class bivalvia in animal kingdom, Biology

Assignment Help:

Explain Class Bivalvia in animal kingdom?

This name of this Class reflects the group's most distinguishing feature. Clams, oysters, scallops and mussels all have two shells that are held together by a hinge ligament at the back. One or two muscles (adductor muscles) are used to pull the shells together, forming a tight seal. Scallops are able to "swim" through the water by "clapping" their shells together rhythmically. The mantle secretes the material that makes up the shell. Another bivalve characteristic is a powerful, muscular foot that can be extended great lengths to help them move about or burrow into the sand or mud.

There are other features that distinguish bivalves from the gastropods or cephalopods. Bivalves do not have an anterior head region, and because they filter the water for food, they also lack a rasping radula. Siphons formed by the mantle provide for the circulation of water past the gills for gas exchange and filter feeding. Although most species of bivalves are marine in distribution, many species do live in fresh water.

 


Related Discussions:- Explain class bivalvia in animal kingdom

Limb regeneration in anuran amphibians, Limb Regeneration in Anuran Amphibi...

Limb Regeneration in Anuran Amphibians We are already aware that the limb of adult frogs does not regenerate later than amputation. Though, some regeneration has been found to

Define criteria for assessment of pyridoxine status, Define Criteria for As...

Define Criteria for Assessment of Pyridoxine Status? Vitamin B 6 status is most appropriately evaluated by using a combination of indicators,  namely plasma PLP concentration,

What is transgenic food, What is transgenic food? Transgenic beings are...

What is transgenic food? Transgenic beings are animals, microorganisms and plants that have recombinant DNA, i.e., genes from other plants, microorganisms or animals artificial

Protozoa, advantages and disadvantages of protozoa

advantages and disadvantages of protozoa

What is aquatic biodiversity, Q. What is aquatic biodiversity? Biodiver...

Q. What is aquatic biodiversity? Biodiversity found on Earth today is the result of 3.5 billion years of evolution. Until the emergence of humans, the Earth supported more biod

Genetics of nitrogen-fixation, Genetics of Nitrogen-fixation The genet...

Genetics of Nitrogen-fixation The genetics of nitrogen-fixation is known in detail in Klebsiella pneumoniae. There are twenty genes required in organising the complete N 2 -fi

Why influenza activity is mandatory in the united states, Healthcare provid...

Healthcare provider reporting of influenza activity is mandatory in the United States.

Investigating, What is scientific investigation?

What is scientific investigation?

Name, what''s you''re name

what''s you''re name

State the term cercaria, State the term Cercaria? A stage in the life c...

State the term Cercaria? A stage in the life cycle of trematode flukes. Cercaria develops from redia found in intermediate host. This tadpolelike organism is released from inte

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd