What do insects echinoderms and mollusks share in common?

What do mollusks, arthropods and echinoderms have in common: vertebrates, invertebrates or bilateral symmetry. …

What is the connecting link between Mollusca and echinodermata?

Peripatus is a connecting link between mollusks and echinodermata.

What is similar about echinoderms and cnidarians?

What is similar about echinoderms and cnidarians? Cnidarians and echinoderms have radial symmetry; mollusks have bilateral symmetry. Cnidarians have no body cavity or cephalization; mollusks and echinoderms have a true coelom and cephalization.

What is the difference between mollusks and molluscs?

For the noun denoting animals of the phylum Mollusca—which includes squid, octopuses, slugs, and snails—mollusk is the preferred spelling in North America, and mollusc is preferred throughout the rest of the English-speaking world. …

What is the difference between Mollusca and Arthropoda?

Hint: Arthropods and molluscs are both invertebrates. Arthropods are organisms having exoskeleton and segmented bodies with paired appendages….Differentiate between Arthropoda and Mollusca.

Arthropoda	Mollusca
The Arthropoda is the largest phylum of the kingdom Animalia.	The Mollusca is the second largest or diverse phylum in the animal kingdom.

What is the best evidence that mollusks and segmented worms share a common ancestor?

Mollusks and segmented worms have a one-way digestive system with a sepa- rate mouth and anus. Their larvae, shown in Figure 13, are sim- ilar and are the best evidence that they have a common ancestor. have many structures that are simi- lar to those of some annelid larvae.

What is the connecting link between Mollusca and Arthropoda?

(a) Molluscs and arthropods.

Which is the connecting link between fishes and amphibians?

Lungfish Protopterus
Complete answer Option A: Lungfish Protopterus is a connecting link between fishes and amphibians.

Why are echinoderms not closely related to cnidarians?

Explanation: Their body is composed of endoderm, mesoderm and ectoderm. While Cnidaria are Diblastica, so they are composed only from two layers: endoderm and ectoderm. In addition larvae of Echinoderms are bilaterally symmetrical and they become nearly-radial only as adults.

How are cnidarians different from mollusks?

Mollusks are invertebrates with soft unsegmented bodies that are often protected by a hard outer shell. Cnidarians (ny DEHR ee unz) are invertebrates that have stinging cells and take food into a central body cavity. Cnidarians use sting cells to capture food and defend themselves. Only bivalves can make pearls.

What do crustaceans and mollusks have in common?

Crustaceans and molluscs are animals that belong to kingdom Animalia. Both are important food sources of humans. Also, both groups have aquatic and terrestrial members. Furthermore, they are invertebrates.

How do mollusks and crustaceans differ?

Crustaceans are aquatic animals that have jointed legs, a hard shell and no backbone, such as crab, crayfish, lobster, prawns and shrimp. Most molluscs have a hinged two-part shell and include clams, mussels, oysters and scallops, as well as various types of octopus, snail and squid.