DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF THE FISHES TERMS DEFINITIONS Ostracoderms bony armor fishes called ostracoderms Agna bans Thejawless fishes are called agnathans Aestivation Aestivation is a dormant state…
FURTHER PHYLOGENETIC CONSIDERATIONS IN FISHES Two important series of evolutionary events occurred during the evolution of the Osteichthves: 1. Evolution of teleosts One of these was an evolutionary explosion of…
EVOLUTIONARY PRESSURES The aquatic environments have physical characteristics. These characteristics are important selective forces for aquatic animals. Fishes have following adaptive characteristics: LOCOMOTION Water is dense. It makes movement through…
SURVEY OF FISHES Debate on taxonomy of fishes is going on for many years. Modern cladistic analysis has revised he taxonomy of this group of vertebrates. (a) Traditional classification: The…
THE FISHES VERTEBRATE SUCCESS IN WATER EVOLUTIONARY PERSPECTIVE Importance of water: Water is a buoyant medium. It resists rapid fluctuations in temperature. Water covers over 70% of the earth's surface.…
OBJECTIVES OF HEMICHORDATA & CHORDATES Multiple Choice Questions MCQs 1. Which of the following is not a deutrostome? (a) Chordates (b) Hemichordates (c) Molluscs (d)Echinoderms 2.Acorn worms belongs to class:…
SUBJECTIVE QUESTIONS OF HEMICHORDATA & CHORDATES 1.Describe evolutionary perspective of phylum Hemichordata. 2. Write phylogenetic relationships of Hemichordates, Echinoderms and Chordates. 3. Give general characteristics of phylum Hemichordata. 4. Describe…
TYPE FUNARIA Occurrence Funaria is terrestrial moss. It grows in the form of bright green velvety patches in shady and damp places. Genus Funaria is composed of 117 species. Funaria…
Answer of Question of the Endocrine System & Chemical Messengers Q.36. Describe the hormones secreted from the gonads in mammals. Ans. Gonads The gonads (ovaries and testes) secrete hormones that…
DEFINITIONS & KEY POINTS FOR OBJECTIVES OF HEMICHORDATA & CHORDATES TERMS DEFINITIONS Tunicates Tunicates and a small group of fishlike cephalochordates lack a vertebral column. Deutrosomes The animals in…
saadia
abida
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