Which animal is pseudocoelomate?Group of answer choicesAscaris (Nematoda)Mytilus (Mollusca)Lumbricus (Annelida)Planaria (Platyhelminthes)
Question
Which animal is pseudocoelomate?Group of answer choicesAscaris (Nematoda)Mytilus (Mollusca)Lumbricus (Annelida)Planaria (Platyhelminthes)
Solution
The animal that is pseudocoelomate among the given options is Ascaris (Nematoda).
Here's a step-by-step explanation:
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Coelom is a fluid-filled cavity within the body of an animal, which is lined by an epithelium derived from mesoderm. Animals are classified into three types based on the type of coelom they possess: Acoelomates (no coelom), Pseudocoelomates (false coelom), and Coelomates (true coelom).
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Ascaris (Nematoda) is a pseudocoelomate. This means that the body cavity of Ascaris is not entirely lined by mesoderm. Instead, it is sandwiched between mesoderm and endoderm.
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Mytilus (Mollusca), Lumbricus (Annelida), and Planaria (Platyhelminthes) are not pseudocoelomates. Mytilus and Lumbricus are coelomates, meaning their body cavity is entirely lined by mesoderm. Planaria, on the other hand, is an acoelomate, meaning it does not have a body cavity.
Similar Questions
Cylindrical, unsegmented worms with a pseudocoelom are classified into the phylumMultiple choice question.Nematoda.Cnidaria.Annelida.Platyhelminthes.
What distinguishes a coelomate animal from a pseudocoelomate animal is thatcoelomates …a. have a body cavity, whereas pseudocoelomates have a solid body.b. contain tissues derived from mesoderm, whereas pseudocoelomates have nosuch tissue.c. have a body cavity completely lined by mesodermal tissue, whereaspseudocoelomates do not.d. have a complete digestive system with mouth and anus, whereaspseudocoelomates have a digestive tract with only one opening.e. have a gut that lacks suspension within the body cavity, whereaspseudocoelomates have mesenteries that hold the digestive system in place.
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What is the largest animal phylum in terms of number of species?Group of answer choicesArthropodsMollusksAnnelidsVertebratesRoundworms
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