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

Determine the term - test-retest reliabilities, Determine the term - Test-r...

Determine the term - Test-retest reliabilities The test manual reports reliability data. Test-retest reliabilities for the 13 main scales range from .78 to .96. The problem of

Explain nephrotoxicity, Explain Nephrotoxicity Nephrotoxicity is the ma...

Explain Nephrotoxicity Nephrotoxicity is the major dose-limiting toxicity of amphotericin B deoxycholate; sodium loading with  normal saline may prevent or ameliorate it and is

Explain briefly about foams, Explain briefly about Foams   Consider the...

Explain briefly about Foams   Consider the following example. Take some liquid in a glass and agitate or shake it vigorously. What do you observe at the top of the liquid. Yes,

What is the vector of chagas disease, What is the vector of Chagas' disease...

What is the vector of Chagas' disease? How is the disease transmitted? The vector of Chagas' disease is its middle host, a triatomine bug. The major species is Triatoma infesta

What do you understand by carcinogens, Q. What are carcinogens? The Car...

Q. What are carcinogens? The Carcinogens are factors capable of producing neoplasias and any mutagen, a substance that can induce DNA mutation, is a potential carcinogen. Insta

Surgery and prosthetic phase of implant therapy, Surgery and Prosthetic Pha...

Surgery and Prosthetic Phase  Implants are uncovered  Impression recorded  Abutment placed  Provisional prosthesis followed by Definitive prosthesis

Circuitry and priming -procedures of oxygenators, Circuitry and Priming : ...

Circuitry and Priming : The cardio pulmonary bypass circuit consists of oxygenator, tubings, cannulae, cardiotomy reservoirs and cardioplegia attachments. The first step is to pri

Define classification of fats and fatty acids, Define Classification of Fat...

Define Classification of Fats and Fatty Acids? You must be wondering in this unit on lipids why we are talking about fats and oils and not using the term lipids. Definitely whe

Explain the systemic antibiotic cover, Explain the systemic antibiotic cove...

Explain the systemic antibiotic cover The need for  systemic antibiotic cover should be considered. The original protocols recommended an antibiotic such as amoxicillin 250 mg

Shows evidence to see the in environment abd ecology, Shows evidence of the...

Shows evidence of the ability to see the interaction between environment / ecology and genetics /  evolution Some candidates may recognise that evolution can result in less no

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