Homework Answers
21. False
Water enters the calm through an incurrent siphon and passes over the gills. After water passes over the gills, it exits the clam through the excurrent siphon.
22. True
Cephalopods are the only mollusks with a closed circulatory system
23. False
Gastropod tentacles doesnot contain photoreceptors. Mollusc larvae primarily possess no photoreceptors. however mollusc contains cerebral photoreceptors.
24. True
The mollusca are considered coelomic species. It have schizocoelom type of coelom.
25. False
Some molluscs use internal fertilization and some are hermaphrodites. About 40% of the 5600 molluscs are either simultaneous or sequential hermaphrodites. Thus cannot be generelize molluscs are hermaphrodites.
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Directions. Write the word true if the statement is true; Write the word false if the...
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1. Write True or False: If it is false make it True by changing one word....
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II. True/False. Write the word true or false by the following statements. (5) 1. A closed shell of re-electrons in an MO diagram of a cyclic compound indicates anti-aromaticity. 2. POCI, is a mild dehydrating agent for alcohols that follows an E2 mechanism. 3. For the re-system of benzene, there are six molecular orbitals with four different energy levels. 4. All meta directors in EAS reactions are strong electron withdrawing groups. 5. The catalyst in electrophilic aromatic substitution lowers the...
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