CLASS POLYPLACOPHORA
saadiaCLASS 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…
SUBJECTIVE QUESTIONS
SUBJECTIVE QUESTIONS Discuss evolutionary perspective of the Aschelminthes. Give general characteristics of Aschelminthes. Give general characteristics of Rotifera. Describe external features of Rotifers. Discuss feeding and digestive system in Rotifers.…
DEFINITIONS & KEY POINTS FOR OBJECTIVES
DEFINITIONS & KEY POINTS FOR OBJECTIVES TERMS DEFINITIONS Cutely In this case, numbers of cells are constant in the entire animal and in each given organ in all…