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2021-05-14

Which feature do the snail and clam have in common?

Which feature do the snail and clam have in common?

What does this snail have in common with a clam? You might notice that both have a shell. That is one feature of the group they both belong to, the mollusks.

Do all mollusks have a foot?

All mollusks have a thin layer of tissue called a mantle which covers their internal organs. The mantle produces the mollusk’s shell. Clams, oysters, snails, and octopuses are all mollusks. Most mollusks move with a muscular structure called a foot.

What makes bivalves different than other mollusks?

The mollusks that have a hinged, two-part shell joined by strong muscles are called bivalves. Clams, Oysters, and Scallops are bivalve mollusks and are a familiar food source. While on the other hand Mussels and Oysters attach themselves with a strong thread or cement to solid surfaces. …

What type of mollusk is dark blue or black?

Mytilus edulis

What are the 5 main classes of Mollusca?

The Phylum Mollusca consist of 8 classes: 1) the Monoplacophora discovered in 1977; 2) the worm-like Aplacophora or solenogasters of the deep sea; 3) the also worm-like Caudofoveata; 4) the Polyplacophora, or chitons; 5) the Pelecypoda or bivalves; 6) the Gastropoda or snails; 7) the Scaphopoda, or tusk shells; and 8) …

How many classes of Mollusca exist?

seven classes

What are the 4 classes of Mollusca?

The four major groups of mollusks (phyla Mollusca) are: 1) chitons; 2) gastropods, including snails, slugs (mostly marine, but some freshwater), and nudibranches.

What are the 4 major groups of living mollusks?

The major classes of living mollusks include gastropods, bivalves, and cephalopods (Figure below).

Do mollusks have brain?

The generalized mollusc has two paired nerve cords, or three in bivalves. The brain, in species that have one, encircles the esophagus. Most molluscs have eyes, and all have sensors to detect chemicals, vibrations, and touch.

What type of body do all mollusks have?

Molluscs are a clade of organisms that all have soft bodies which typically have a “head” and a “foot” region. Often their bodies are covered by a hard exoskeleton, as in the shells of snails and clams or the plates of chitons.

Is a jellyfish a mollusk?

Ans: Phylum mollusca include soft bodied animals with hard shell Eg: snails, octopus, mussels, oysters. Phylum Coelenterata contain special structure called coelenteron where the food digested.It include jelly fish and sea anemones.

Is Octopus a fish?

Yes, a mollusk — like your common garden snail. To be more specific, an octopus belongs to a unique class of mollusks known as cephalopods. To put it in simpler terms, this why an octopus has no bones — no skeleton — it is an invertebrate. A fish has a backbone and a skeleton — it is a vertebrate.

Why do octopus die after mating?

Octopuses are semelparous animals, which means they reproduce once and then they die. After a female octopus lays a clutch of eggs, she quits eating and wastes away; by the time the eggs hatch, she dies. Females often kill and eat their mates; if not, they die a few months later, too).

How do octopuses give birth?

Female octopuses lay their eggs and painstakingly weave them together into strands. They then sit guard for weeks, months and sometimes as long as a year. It only takes two or so octopuses out of each clutch to survive and reproduce to keep an octopus population steady. Baby octopuses, good luck out there.

Do octopuses feel pain?

Octopuses can feel pain, just like all animals. Of eating an octopus alive, Dr. Jennifer Mather, an expert on cephalopods and a psychology professor at the University of Lethbridge in Alberta, Canada, says the following: “[T]he octopus, which you’ve been chopping to pieces, is feeling pain every time you do it.

How many eggs do octopuses lay?

The amount of eggs a female octopus can produce and lay varies depending on the species. The Giant Pacific Octopus for example will lay between 20,000 to 100,000 eggs. Speaking generally however, octopuses can lay up to 200,000 eggs!

Do octopuses mate for life?

As with most creatures, the octopus’s main purpose in life is to reproduce. Both the male and female octopuses die soon after mating. The male dies a few months afterward, while female dies shortly after the eggs hatch. For octopuses, mating is a pretty subdued affair.

Do octopuses poop?

How does an octopus poop? An octopus expels waste through it’s siphon located on the side of its mantle – the siphon is also responsible for shooting jets of water to propel itself forward and dispersing ink to protect against predators.

Do male octopus have balls?

Do male octopus have balls? They have nothing akin to the mammalian testicle, but they do possess a single testis sac, accommodated within the mantle of the animal.

Why do animals die after mating?

They have just one chance to reproduce—usually meaning one mating season, but occasionally meaning one act of sex—then they die. Sure, they die afterwards, but because they’re not concerned with survival after the mating season, they can quite literally put all of their energy and resources into finding a mate.

Which animal mates the longest?

1. Brown antechinus. For two weeks every mating season, a male will mate as much as physically possible, sometimes having sex for up to 14 hours at a time, flitting from one female to the next.

Which animals kill their mates?

But octopuses aren’t the only ones who kill their sex partners. Female praying mantises often kill their mates, especially if they’re hungry, and within certain species of spiders, the males will actually offer themselves as a meal for their newly-impregnated partners.

Which is the animal that never sleeps?

Bullfrogs

What animals give birth through their mouth?

The gastric-brooding frog is the only known frog to give birth through its mouth. According to researchers at the University of South Wales, the frog lays eggs but then swallows them.