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All mollusks are protostomes, so bivalves, which are mollusks, are also protostomes. The differences between protostomes and deuterostomes occurs...
- Are clams deuterostomes or protostomes?
- What kind of sensory structures do bivalves have?
- Are chordates protostomes or deuterostomes?
- What organisms are protostomes?
- Do bivalves have gills?
- What are characteristics of bivalves?
- Do molluscs have tissue?
- Is phylum Cnidaria Protostome or Deuterostome?
- Are molluscs deuterostomes?
- Which animal is not a protostome?
- Are mammals protostomes or deuterostomes?
- Are bivalves Monoecious or dioecious?
- Are bivalves invertebrates?
Are clams deuterostomes or protostomes?
Animals in the phylum Mollusca include clams, snails, octopuses, and sea slugs (pictured right). They are all protostome coelomates.
What kind of sensory structures do bivalves have?
The sensory organs of bivalves are not well developed and are largely located on the posterior mantle margins. The organs are usually mechanoreceptors or chemoreceptors, in some cases located on short tentacles. The chemoreceptor cells taste the water and are sensitive to touch.
Are chordates protostomes or deuterostomes?
The majority of animals more complex than jellyfish and other Cnidarians are split into two groups, the protostomes and deuterostomes. Chordates (which include all the vertebrates) are deuterostomes.
What organisms are protostomes?
Protostomia, group of animals—including the arthropods (e.g., insects, crabs), mollusks (clams, snails), annelid worms, and some other groups—classified together largely on the basis of embryological development.
Do bivalves have gills?
Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable "foot" that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow.
What are characteristics of bivalves?
The bivalves are bilaterally symmetrical mollusks, enclosing the soft internal body. Common feeding characteristics of bivalves include filtering out particle food through an enlarged pair of gills known as ctenidia. Most bivalves are sedentary, but some use their foot to glide across substrate.
Do molluscs have tissue?
Mollusks have a hard outer shell. There is a layer of tissue called the mantle between the shell and the body. Most mollusks have tentacles for feeding and sensing, and many have a muscular foot. Mollusks also have a coelom, a complete digestive system, and specialized organs for excretion.
Is phylum Cnidaria Protostome or Deuterostome?
Cnidaria are neither protostomes or deuterostome, as both of these superphylum belong to the Bilateria clade of animals, animals that exhibit...
Are molluscs deuterostomes?
Molluscans are protostomes.
Their mouth arise from the embryonic blastopore. ... The blastopore becomes mouth in protostomes (i.e. mouth appeared first) while in deuterostomes it forms anus (i.e. mouth appears later). Please read this answer as well.
Which animal is not a protostome?
Flatworms (or platyhelminths) are a variety of invertebrate acoelomates (no body cavity) falling into the protostome clade.
Are mammals protostomes or deuterostomes?
The vertebrates, in turn, comprise the sharks, bony fishes, amphibians, reptiles (including birds), and mammals. Animals that are not verte- brates are collectively known as invertebrates. Echinoderms, hemichordates, and Xenoturbella are considered invertebrates, even though they are deuterostomes.
Are bivalves Monoecious or dioecious?
Sexes of bivalves can be separate (dioecious) or hermaphroditic (monoecious). The gonad may be a conspicuous, well defined organ as in scallops or occupy a major portion of the visceral mass as in clams.
Are bivalves invertebrates?
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.
