CLASS MONOPLACOPHORA (mono, one + plak, plate + phoros, bear)
saadiaCLASS MONOPLACOPHORA (mono, one + plak, plate + phoros, bear) The members of the class Monoplacophora have an undivided, arched shell. They have a broad flat foot. They have serially…
CLASS SCAPHOPODA (skaphe boat + podus, foot)
CLASS SCAPHOPODA (skaphe boat + podus, foot) 1. Habitat: Members of the class Scaphopoda are called tooth shells or tusk shells. This class has over three hundred species. All are…
CLASS POLYPLACOPHORA
CLASS POLYPLACOPHORA Habitat: The Class Polyplacophora contains the Chitons. Chitons live on hard substrates in shallow marine water. Early Native Americans ate Chitons. Chitons have a fishy flavor. But…
CLASS CEPHALOPODA (L. cephalic, head + Or. podos, foot)
CLASS CEPHALOPODA (L. cephalic, head + Or. podos, foot) The class Cephalopoda includes the octopuses. squid, cuttlefish. and nautili. They are the most complex molluscs. The anterior portion of their…
CLASS BIVALVIA (bis, twic + vala; leaf)
CLASS BIVALVIA (bis, twic + vala; leaf) There are 30,000 species of this class. It is the second largest molluscan class. This class includes the clams, oysters, mussels, and scallops.…
Class Gastropoda (or. gaster, gut + podos, foot)
CLASS GASTROPODA (Or. gaster, gut + podos, foot) The class Gastropoda includes the snails. limpets, and slugs. It has 35.000 living species. It is the largest class of molluscs. Its…
CLASSIFICATION
CLASSIFICATION 1. Class Caudofoveata 1.They are wormlike molluscs. 2. They have cylindrical, shell-less body and scale like, calcareous spicules. 3. They lack eyes, tentacles, statocysts. crystalline style, foot, and nephridia.…
MOLLUSCAN CHARACTERISTICS
MOLLUSCAN CHARACTERISTICS The size of molluscs varies greatly. The largest body form is the giant squid 18 m in length. The smallest garden slug is less than 1 cm long.…
Chapter 6 : MOLLUSCAN SUCCESS
MOLLUSCAN SUCCESS EVOLUTIONARY PERSPECTIVE Some of the molluscs like octopuses, squids, and cuttlefish (the cephalopods) are most adapted predators. The evolution of large brains in them takes place due to…
OBJECTIVES
OBJECTIVES Multiple Choice Questions MCQs 1. Which is irrelevant for aschelminths? (a) Cutely (b) Mesenteries (c) Protonephridia (d) Cephalization 2. The constant number of cell in an organ or tissue…