What is the difference between a mollusk and an annelid?
What is the difference between a mollusk and an annelid?
Mollusks are invertebrates such as the common snail. Most mollusks have shells. Annelids are worms such as the familiar earthworm. They have segmented bodies.
Why are annelids and mollusks closely related?
Molluscs include such familiar creatures as clams, oysters, snails, and octopi. They share a distant common ancestor with the annelid worms, an evolutionary heritage suggested by their larval form, called a trochophore larva, found in all molluscs and in certain marine annelids called polychaete worms.
What are the anatomical differences between Nemertines and mollusks?
Mollusks have a shell, even if it is a reduced shell. Nemertines do not have a shell. Nemertines have a proboscis; mollusks do not. Nemertines have a closed circulatory system, whereas Mollusks have an open circulatory system.
What is the difference between Arthropoda and Mollusca?
Arthropods are organisms having exoskeleton and segmented bodies with paired appendages….Differentiate between Arthropoda and Mollusca.
| Arthropoda | Mollusca |
|---|---|
| Arthropods have wings to fly with jointed legs usually to their abdominal segments. | Molluscs have a muscular foot that helps in locomotion. |
Do mollusks have appendages?
Most mollusks have a scraping feeding appendage known as a radula and an organ at the top of their bodies called a mantle. What is the function of a slug?
What is the name of a marine gastropod?
The crossword clue Marine gastropod with 7 letters was last seen on the June 02, 2021. We think the likely answer to this clue is ABALONE.
Are all bivalves Marine?
Bivalves belong to the invertebrate phylum Mollusca, which also includes snails, squids, and octopuses. Some well-known bivalves include clams, scallops, mussels, and oysters. More than 15,000 species of bivalves exist. All bivalves are aquatic, encompassing both marine and fresh-water species.
Are mollusks vertebrates?
Mollusks are invertebrates that have a mantle — a body structure that excretes a shell or protective coating for the animal.
Is Haliotis diversicolor a trochophore or veliger?
Background: Haliotis diversicolor is commercially important species. The trochophore and veliger are distinct larval stages in gastropod development. Their development involves complex morphological and physiological changes.
What is the difference between trochophore and veliger larvae?
Compared with trochophore larvae, veliger larvae had 55 proteins upregulated and 49 proteins downregulated. These differentially expressed proteins were involved in shell formation, energy metabolism, cellular and stress response processes, protein synthesis and folding, cell cycle, and cell fate determination.
Who discovered trochophore larva?
Loven (1840), a Swedish naturalist, was the first man who discovered trochophore larva. Since then the larva was known as Loven’s larva. 2. Semper (1859) used the name Trochosphaera, a rotifer for the organism. 3.
Are trochophores Trochozoa?
Trochophores exist as a larval form within the trochozoan clade, which include the entoprocts, molluscs, annelids, echiurans, sipunculans and nemerteans.
