Characterization of respiratory system in aquatic molluscs
How is the respiratory system in the aquatic molluscs characterized? What adaptive respiratory structure does terrestrial molluscs exists?
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Aquatic molluscs oxygenate their blood via gills in direct contact through water. In terrestrial molluscs the rich vascularity beneath the mantle cavity absorbs air doing the function of a primitive lung.
Describe the term myoglobin? Write the function of such molecule in the muscle tissue?
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Is the nervous system in platyhelminthes less or more sophisticated than in cnidarians? What are the major neural structures found in flat-worms? How is this neural organization significant for the diversity of biological niches explored by the specie
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Explain the animal pole and the vegetal pole of vertebrate egg?
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State two main classes into which the fishes are divided?
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How simple closed circulation and double closed circulation are distinguished?
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