Answer
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Hint:The term body plan can be defined as a group of structural characters that can be used in the identification of animals whereas body symmetry is defined as ordered repetition of specific body parts.
Complete answer:
Body plans are used to define not only different taxonomic groups but also classification among those groups. Features such as timing, pattern and scale of developmental events help to shape the body structure of an organism. Biological symmetry is observed in most organisms including plants, animals, fungi and also bacteria. Body symmetry also helps to define taxonomic groupings of different organisms. Body symmetry can be of different types- radial symmetry where identical parts are arranged around a central axis, bilateral symmetry where equal body parts are present on either side of a vertical axis, asymmetry where there is no definite body symmetry. These are the three major types of body symmetry though nowadays few more types have been classified. Different organisms have different kinds of body plan and symmetry. In the given question only frogs and locusts show similar body plan and symmetry as both of them are coelomates having bilateral body symmetry while the others have either different body plan or different body symmetry.
Hence the correct answer is option (A) Frog and locust.
Note: Knowledge about the body plan and body symmetry is important because it has been helpful in classification of organisms into different classes. Starfish is a radial symmetrical animal, whereas a seahorse is bilaterally symmetrical. Sponges are not true coelomates, whereas annelids are coelomates. Pigeons are true coelomates, whereas liver fluke is pseudocoelomates.
Complete answer:
Body plans are used to define not only different taxonomic groups but also classification among those groups. Features such as timing, pattern and scale of developmental events help to shape the body structure of an organism. Biological symmetry is observed in most organisms including plants, animals, fungi and also bacteria. Body symmetry also helps to define taxonomic groupings of different organisms. Body symmetry can be of different types- radial symmetry where identical parts are arranged around a central axis, bilateral symmetry where equal body parts are present on either side of a vertical axis, asymmetry where there is no definite body symmetry. These are the three major types of body symmetry though nowadays few more types have been classified. Different organisms have different kinds of body plan and symmetry. In the given question only frogs and locusts show similar body plan and symmetry as both of them are coelomates having bilateral body symmetry while the others have either different body plan or different body symmetry.
Hence the correct answer is option (A) Frog and locust.
Note: Knowledge about the body plan and body symmetry is important because it has been helpful in classification of organisms into different classes. Starfish is a radial symmetrical animal, whereas a seahorse is bilaterally symmetrical. Sponges are not true coelomates, whereas annelids are coelomates. Pigeons are true coelomates, whereas liver fluke is pseudocoelomates.
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