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Why is the internal shell of Cephalopods significant to their adaptation?
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- Cephalopods are active marine predators, and many molluscan features are modified to fulfill their niche. Explain how each molluscan feature is modified, compared to gastropod and bivalve body plans. 1) Molluscan foot 2) Excurrent Siphon 3) Shell 4) Sensory organs and brainDescribe how cephalopods swim and how they eat.How does the lifestyle of a gastropod differ from that of a cephalopod?Identify adaptations that have evolved in each for its particular lifestyle.
- Distinguish between (a) radial and bilateral symmetry; (b) blastula andgastrula; (c) direct and indirect development; (d) complete andincomplete digestive tracts; (e) coelom and pseudocoelom.How do the presence/loss, form, and function of the radula differ within members of the Classes Bivalvia, Polyplacophora, and Cephalopoda (using the squid as a representative)? B) How does this relate to the animals’ natural histories?How do the skin and respiratory systems of amniotes differ from those of their early tetrapod ancestors?
- Select all of the following that are true about cephalopods. A)They may be very large and can weigh over 1000 pounds. B)They are very intelligent and are capable of learning by observation. C)They are exclusively herbivorous. D)They have a closed circulatory system E)They lack a shell.a) List down subclasses of Gastropoda b) Snails are distinguished by an anatomical process known as where the visceral mass of the animals rotates 180° to one side during the development. c) acts as a trapdoor to close the shell. d) How many tentacles do the land snails have? e) What is the function of radula?Why is bilateral symmetry of adaptive value for actively motile animals?
- How can the features of the arthropod exoskeleton explain the terrestrial adaptation of some species of the phylum?What is the external rigid carapace of arthropods called? Of which substance is it made? Which type of organic molecule is that substance?How useful is the study of the nature of body cavity and coelom in theclassification of animals?