BIOL 1002 : Exam 2 Review
Document Summary
Includes clams, snails, and cephalopods: mollusks reproduce sexually, some species have separate sexes, others are hermaphroditic, phylum arthropoda, arthropods are the most diverse and abundant animals. Phylum echinodermata: echinoderms have a calcium carbonate skeleton. Know the 3 classes of mollusks and be able to give examples of each. Understand the key features of arthropods, including what an exoskeleton is and the process of molting. Arthropods have appendages and an exoskeleton (external skeleton) The exoskeleton: protects against predators, provides for a range of movement of the appendages, provides a watertight covering, the exoskeleton must be molted (shed) periodically so that the animal can grow in size. It has rasping teeth on its tongue, which are used to excavate a hole in the hosts body wall through which the lamprey sucks blood and body fluids: cartilaginous fishes, these are marine predators. But these proteins are easily broken down in the stomach: venom is only dangerous if it gets directly into the bloodstream.
