BIOLOGY
BIOLOGY
5th Edition
ISBN: 9781265202859
Author: BROOKER
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Chapter 57.2, Problem 1CS

Chapter 57.2, Problem 1CS, (a) A quahog clam, cless Bavalvia (b) A chlton, class Polyplacophora (c) A snail, class Gastropoda , example  1

(a) A quahog clam, cless Bavalvia

Chapter 57.2, Problem 1CS, (a) A quahog clam, cless Bavalvia (b) A chlton, class Polyplacophora (c) A snail, class Gastropoda , example  2

(b) A chlton, class Polyplacophora

Chapter 57.2, Problem 1CS, (a) A quahog clam, cless Bavalvia (b) A chlton, class Polyplacophora (c) A snail, class Gastropoda , example  3

(c) A snail, class Gastropoda

Chapter 57.2, Problem 1CS, (a) A quahog clam, cless Bavalvia (b) A chlton, class Polyplacophora (c) A snail, class Gastropoda , example  4

(d) A nudbranch, class Gastropoda

Chapter 57.2, Problem 1CS, (a) A quahog clam, cless Bavalvia (b) A chlton, class Polyplacophora (c) A snail, class Gastropoda , example  5

(e) A blue-ringed octopus, class Cephalopodan

Figure 34.12 Mollusks. (a) A bivalve shell, class Bivalvia, with growth rings. This quahog clam (Mercenaria mercenaria) can live over 20 years. (b) A chiton (Tonicella lineata), a polyplacophoran with a shell made up of eight separate plates. (c) A gastropod, the tree snail, Liguus fasciatus, from the Florida Everglades showing its characteristic coiled shell. (d) A nudibranch (Phyllidia ocellata). The nudibranchs are a gastropod subclass whose members have lost their shell altogether. (e) The highly poisonous blue-ringed octopus (Hapalochlaena lunulata), a cephalopod.

Core Skill: Connections Refer back to Figure 34.12. Which types of antipredator adaptations are possessed by mollusks?

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Class Gastropoda and Class Bivalvia independently evolved modifications to their body plan that allowed them to invade sandy and muddy habitats, burying their bodies under the surface and accessing the surface via siphons. For an example organism in each Class, (1) draw a diagram showing the morphological modifications and (2) write a description of how this organism had evolved from the hypothetical ancestral mollusk (HAM) body plan.
The distinction between sponges and other animal phyla is based mainly on the absence versus the presence of (A) a body cavity. (B) a complete digestive tract. (C) mesoderm. (D) tissues.
this is mytilus edulis. You may have noticed that many mollusks evolved to form a shell although some have a reduced shell or none at all. Which part of their body produces the shell?
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From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license