What kind of symmetry does mollusca have?

Mollusks have bilateral symmetry. – The two halves of the body mirror each other. Gastropods (snails) ~ eat with a radula (tiny tongue covered with teeth.

1. What type of symmetry is Mollusca?
2. Is Mollusca a radial symmetry?
3. Are Mollusca bilaterally symmetrical?
4. Is Mollusca asymmetrical?
5. Are Cnidaria bilateral symmetry?
6. What type of skeleton do Mollusca have?
7. Does Mollusca have exoskeleton?
8. What is the level of organization of Mollusca?
9. Does Mollusca have segmentation?
10. Which of the following animal from phylum Mollusca is bilaterally asymmetrical *?
11. In which class of Mollusca bilateral symmetry is absent?
12. Which of these molluscs is asymmetrical in adult stage?
13. Which molluscs has asymmetry torsion?
14. Is Mollusca Triploblastic?
15. Which is the second largest animal phylum?

What type of symmetry is Mollusca?

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.

Is Mollusca a radial symmetry?

Sea stars have perhaps the most visually obvious radial symmetry. Echinoderms begin life as bilaterally symmetrical, plankton-like larvae, but as they mature their body shape changes. Most mollusks, on the other hand, exhibit bilateral symmetry.

Are Mollusca bilaterally symmetrical?

Mollusca can be found in freshwater, marine and terrestrial habitats. More features of molluscs include bilateral symmetry, soft or unsegmented bodies, respiration via ctenidium, ganglia/nerve comprised nervous system, haemocoel body cavity, etc.

Is Mollusca asymmetrical?

Animals in class Gastropoda (“stomach foot”) include well-known mollusks like snails, slugs, conchs, sea hares, and sea butterflies. ... These animals are asymmetrical and usually present a coiled shell.

Are Cnidaria bilateral symmetry?

The bilateral symmetry of Cnidaria is thought to be inherited from the common ancestors of both cnidarians and triploblastic bilaterians. The secondary radial symmetry of Cnidaria evidently is a result of the adaptation to the sessile mode of life.

What type of skeleton do Mollusca have?

Unlike the internal skeleton of humans, mollusks actually have an external skeleton. This exoskeleton protects the animal's soft inner body parts and acts as a sight for muscle attachment.

Does Mollusca have exoskeleton?

Molluscs are mostly aquatic, and are named from the Latin molluscus, meaning "soft". Their soft bodies are enclosed in a hard shell made of calcium carbonate (CaCO3), which functions as an exoskeleton. This shell is secreted by a thin sheet of tissue called the mantle, which encloses the internal organs like a glove.

What is the level of organization of Mollusca?

They exhibit organ system level of organization. Their body has a cavity. The body is divided into head, visceral mass, muscular foot and mantle.

Does Mollusca have segmentation?

Mollusks are probably most closely related to organisms in the phylum Annelida, also known as segmented worms. ... Unlike segmented worms, however, mollusks do not have body segmentation. The basic mollusk body shape is usually quite different as well.

Which of the following animal from phylum Mollusca is bilaterally asymmetrical *?

Gastropoda- Larvae are bilaterally symmetrical, but in adult, the twisting of viscera makes them lose this symmetry. Some, like land snail and slug (a shell-less form), live on land. Bivalvia- they are sedentary filter feeders.

In which class of Mollusca bilateral symmetry is absent?

Echinodermata is the class of phylum mollusca, the larvae are bilaterally symmetrical but the symmetry is lost in adults.

Which of these molluscs is asymmetrical in adult stage?

Animals in class Gastropoda (“stomach foot”) include well-known mollusks like snails, slugs, conchs, sea hares, and sea butterflies. Gastropoda includes shell-bearing species as well as species with a reduced shell. These animals are asymmetrical and usually present a coiled shell (Figure 4).

Which molluscs has asymmetry torsion?

Gastropods are characterized by their asymmetric bodyplan, which develops through a unique ontogenetic process called 'torsion'.

Is Mollusca Triploblastic?

Mollusks are triploblastic (having three primary germ layers: the ectoderm, mesoderm, and endoderm) protostomes. The principal body cavity is a blood-filled hemocoel.

Which is the second largest animal phylum?

Mollusca is the second largest phylum in the animal kingdom.