What type of symmetry is found in mollusks and arthropods?

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.

What is the body symmetry of Mollusca?

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

How are mollusks different from arthropods?

Arthropods are organisms having exoskeleton and segmented bodies with paired appendages. On the other hand, the molluscs have shells surrounding their soft bodies. Arthropods are animals having a segmented body with paired appendages or legs. Molluscs are animals having soft bodies usually covered in mucus.

Do arthropods have body symmetry?

Arthropods that live on land have a series of tubes throughout their body called a tracheae. Arthropods are bilaterally symmetrical, that means that if you sliced them from top to bottom, each half would be exactly the same!

What type of symmetry do humans possess?

bilateral symmetry
Symmetry and sex The body plans of most animals, including humans, exhibit mirror symmetry, also called bilateral symmetry. They are symmetric about a plane running from head to tail (or toe). Bilateral symmetry is so prevalent in the animal kingdom that many scientists think that it can’t be a coincidence.

What symmetry do arthropods have?

One character inherited by all arthropods is bilateral symmetry.

Does Mollusca have symmetry?

Taxonomic level: phylum Mollusca; grade of construction: organs derived from three tissue layers; symmetry: bilateral; type of gut: complete, with anus; type of body cavity other than gut: coelom; segmentation: absent; circulatory system: usually open to large coelomic cavity; nervous system: brain, with nerve cords …

Does porifera have symmetry?

Asymmetry. Only members of the phylum Porifera (sponges) have no body plan symmetry.

Are mollusks segmented?

The phylum Mollusca is the second most diverse phylum after Arthropoda with over 110,000 described species. Mollusks may be primitively segmented, but all but the monoplacophorans characteristically lack segmentation and have bodies that are to some degree spirally twisted (e.g. torsion).

Is butterfly an arthropod?

Arthropods are a motley crew: cockroaches, crabs, butterflies, beetles, centipedes, scorpions, shrimp, spiders, lobsters, lice, ticks, termites, potato bugs, and sea monkeys (a.k.a., brine shrimp) — they’re all examples of arthropods.

Which symmetry is most common in animals?

bilaterally symmetrical
Most animals are bilaterally symmetrical with a line of symmetry dividing their body into left and right sides along with a “head” and “tail” in addition to a top and bottom. Only sponges (phylum Porifera) have asymmetrical body plans.

Do humans have bilateral symmetry?

Symmetry and sex The body plans of most animals, including humans, exhibit mirror symmetry, also called bilateral symmetry. They are symmetric about a plane running from head to tail (or toe).

What’s the difference between an arthropod and a mollusk?

The key difference between mollusks and arthropods is that mollusks are soft-bodied invertebrates with one or two shells while arthropods are animals with segmented bodies, paired appendages and an exoskeleton.

What are the characteristics of the phylum Mollusca?

Most members of the Phylum Mollusca share these characteristics: hard, calcium carbonate (limestone) shell that is secreted by the mantle (a protective layer of tissue surrounding organs) muscular foot used for motility or grasping

Which is an example of a soft bodied mollusk?

Mollusks (MAH lusks) are soft-bodied invertebrates with bilateral symmetry and usually one or two shells. Their organs are in a fluid-filled cavity. The word molluskcomes from the Latin word meaning “soft.”Most mollusks live in water, but some live on land. Snails, clams, and squid are examples of mollusks.

What kind of circulatory system does a mollusk have?

Most mollusks have an _____ circulatory system. Snails and slugs are found in the class of mollusks called the _____., Which mollusk has a highly developed brain and eyesight as well as eight tentacles?,