Speculate about the selective advantage of radial symmetry and a diffuse nerve net for sessile and free-floating animals such as sea anemones and jellyfish
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Speculate about the selective advantage of radial symmetry and a diffuse nerve net for sessile and free-floating animals such as sea anemones and jellyfish
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- Describe the location of the nerve cord in arthropods. (Think of the crayfish.)Which details provide the best evidence that masses of neurons act as brains within different parts of the octopusThe sense of pain is transduces by tonic receptors. What adaptive significance might this have? Give typing answer with explanation and conclusion
- Explain how a sea anemone’s nerve net differs from the nervoussystem of a flatworm in its structure and functionExplain how the forebrain, midbrain,hindbrain, and the sensory structures with which each brain division isconcerned to have developed to meet sensory requirements for amphibianlife on land.Explain how the forebrain, midbrain, hindbrain, and their associated sensory structures have developed to meet sensory requirements for amphibian life on land
- Choose the manipulation most likely to disrupt the complex behaviors of earthworms. Destruction of the nerve net in the head region Destruction of the anterior ganglia Blocking communication among neurons in the ganglia of posterior segments Severing the dorsal nerve cord in the region of the head Blocking communication between the dorsal nerve cord and efferent neurons leading to muscles.Describe the cnidarian (radiate) nervous system. How is a tendency toward centralization of the nervous system manifested in flatworms, annelids, molluscs, and arthropods?Briefly explain why it is particularly difficult for small insects to localise sound. Then describe the ways in which antennal and tympanal insects localise sound, both at the biophysical and neurophysiological level.
- Explain how ultrasonic detectors of certain nocturnal moths are adapted to help them escape an approaching batFill in the blank: Meissner’s corpuscles are responsible for the sense of light _______________________.Multiple Choice Question: Which of the following sensory structures of insects can detect air- or substrate-borne vibrations and may be used in vibroacoustic communication? a. basiconic sensillum b. subgenual organ c. rhabdom d. Johnston's organ e. tympanum f. dioptric apparatus g. retinular cell h. a, cand f i. b, f and g j. b, d and e k. a, b and g