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.
Question
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.
Solution
The main difference between a coelomate and a pseudocoelomate animal is that coelomates have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not. This is option c.
Here's a step-by-step explanation:
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Both coelomates and pseudocoelomates have a body cavity, so option a is incorrect.
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Both types of animals contain tissues derived from mesoderm, so option b is incorrect.
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Coelomates have a body cavity (coelom) that is completely lined by mesodermal tissue. In contrast, pseudocoelomates have a body cavity (pseudocoelom) that is not completely lined by mesodermal tissue. The cavity is lined on the outside by mesoderm and on the inside by endoderm. Therefore, option c is correct.
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The presence of a complete digestive system with a mouth and anus is not a distinguishing feature between coelomates and pseudocoelomates, so option d is incorrect.
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The position or suspension of the gut within the body cavity is also not a distinguishing feature between coelomates and pseudocoelomates, so option e is incorrect.
Similar Questions
What is an accurate description of the pseudocoelom?Multiple choice question.It is a body cavity that develops embryologically between the endoderm and ectoderm.It is a body cavity that develops embryologically between the mesoderm and endoderm.It is a body cavity that develops embryologically between the mesoderm and ectoderm.
Which animal is pseudocoelomate?Group of answer choicesAscaris (Nematoda)Mytilus (Mollusca)Lumbricus (Annelida)Planaria (Platyhelminthes)
Why can't we base animal classification on whether or not an animal has a coelom?Multiple choice question.Because animals without a coelom exhibit a variety of lifestyles (carnivores, parasites, etc.)Because the acoelomate and pseudocoelomate conditions have evolved multiple timesBecause animals with a coelom exhibit a striking diversity of forms and functions
The coelom is a fluid-filled cavity that forms completely within the ______ during embryonic development of some bilaterally symmetrical animals.Multiple choice question.ectodermmesodermendoderm
Which of the following is true concerning coelomates?Multiple choice question.Coelomates can be either protostomes or deuterostomesAll coelomates are protostomes.All coelomates are deuterostomes.
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