Questions and Answers
What type of skeleton do invertebrates have?
What do invertebrates consume for energy?
Other organisms
Invertebrates generally have differentiated tissues except for ______.
Porifera
Invertebrates possess a vertebral column.
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How many openings does an invertebrate's digestive chamber typically have?
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Where is the pneumostome located in gastropods?
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What is the name of the breathing hole in gastropods?
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All gastropods are symmetrical.
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Glaucus atlanticus exhibits internal symmetry.
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Study Notes
Invertebrates Overview
- Invertebrates possess either a hydrostatic skeleton (e.g., worms, jellyfish) or a hard exoskeleton (e.g., insects, crustaceans).
Characteristic Features
- Lack a vertebral column, distinguishing them from vertebrates.
- Classified as heterotrophs, relying on the consumption of other organisms for nourishment.
- Generally composed of specialized tissues, with the exception of Porifera (sponges) which lack tissue differentiation.
- Have a digestive chamber that may have one or two openings to the exterior, facilitating digestion and waste expulsion.
Morphological Features
- Gastropods, a class of mollusks, exhibit asymmetry, particularly evident in those with a helical shell.
- Although gastropods may initially appear externally symmetrical, they feature a pneumostome, a breathing hole located consistently on the right side.
- Example organism: Glaucus atlanticus, which shows external symmetry but develops asymmetrical cerates during growth.
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Description
Explore the fascinating world of invertebrates, focusing on their structural and morphological features. This quiz covers characteristics such as the absence of a vertebral column and the various skeletal forms they possess, including hydrostatic and exoskeletons. Test your knowledge about these diverse organisms and their unique adaptations.
