Question

What are the 5 main characteristics of Phylum Mollusca?​

Answer 1

Main Characteristics of Phylum Mollusca are as follows

• It is considered as the second largest animal phylum.

• Generally they have bilateral symmetry some members also have asymmetrical like snail.

• Three layers are found in it means they are triploblastic.

• Mantle is present on their spongy skin.

• Digestive tract is complete.

• The members of this phylum has Radula as feeding organ.

• Circulatory system is open type.

• Respiratory pigment is Haemocyanin which is blue in colour.

• Excretory system includes 1 to 2 pairs of sac like kidneys.

• Nervous system is present in members of this phylum.

• They are mostly ovaiparous.

Example- Sepia, Pila, Loligo, Octopus etc

Answer 2

Questions—

What are the 5 main characteristics of Phylum Mollusca?

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$\huge\sf\underline{Phylum\: Mollusca}$

Defination—

Mollusca are the aquatic animals with the soft body covered with the hard calcareous shell. they are triploblastic and bilaterally symmetrical.

The 5 important characteristics of Mollusca are—

✴Coelom is reduced to a pericardial cavity around the heart.

✴ The locomotory structure is represented by muscular foot.

✴ The molluscs shell is secreted by a thin sheet of tissue, called as the mantle, which encloses the internal organs.

✴ The nervous system is made up of paired ganglia, connectives, and nerves.

The circulatory system is open, with heart and aorta.

✴ They are triploblastic, which three layers.Also they are bilaterally symmetrical.

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