GENERAL HISTOLOGY

OESOPHAGUS STOMACH

ECHINODERMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What type of symmetry do MOST mollusks have?
A
Bilateral
B
Radial
C
Circular
D
Asymmetrical
Explanation: 

Detailed explanation-1: -Mollusks have bilateral symmetry. – The two halves of the body mirror each other.

Detailed explanation-2: -All animals of the phylum Mollusca have bilateral symmetry. Three major classes make up the phylum Mollusca. The first class includes the gastropods, a group of land snails and slugs. The second class encompasses the bivalves, a group of oysters, clams, and other organisms with two shells.

Detailed explanation-3: -Mollusks are generally considered a phylum of bilaterally symmetrical animals, although there are also many asymmetrical species. Bilateral symmetry means that an organism can only be divided into two equal halves if it is cut from top to bottom along the middle of the anterior-posterior (front-back) axis.

Detailed explanation-4: -No, all of the members of the mollusc phylum display bilateral symmetry. Examples of molluscs include snails, clams, octopi, squids, and muscles.

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