BIOL 1002 : Exam 2
Document Summary
Invertebrates: lack vertebral column: vertebrates: possess vertebral column, porifera: sponges. Include spiders, mites, ticks, and scorpions: have no antennae, have eight walking legs, most are carnivorous (feed on blood or predigested prey, some arachnids, such as spiders and scorpions, inject paralyzing venom into prey. Chapter 24-vertebrates: understand the key adaptations that successfully invade most habitats, the presence of an internal skeleton that can grow and repair itself allowed for greater size and mobility, enabling these animals to invade most habitats. 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. Large predatory fish such as the tuna have been reduced to 10% of their original population sizes due to overfishing: coelacanths, have hollow spines, and are often referred to as the prehistoric fish. Live in stagnant waters low in oxygen: have both gills and lungs.
