Survey of Fishes – Classification and life cycle
saadiaSURVEY 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…
Chapter 12 : THE FISHES VERTEBRATE SUCCESS IN WATER
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
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
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…
DEFINITIONS & KEY POINTS FOR OBJECTIVES OF HEMICHORDATA & CHORDATES
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…
FURTHER PHYLOGENETIC CONSIDERATIONS
FURTHER PHYLOGENETIC CONSIDERATIONS Relationship between Hemichordates and Chordates It is difficult to establish evolutionary relationships between the hemichordates and chordates. Two common characteristics are present between these groups: 1. Dorsal…
PHYLUM CHORDATA (chorda, cord)
PHYLUM CHORDATA (chorda, cord) Phylum Chordata has about 45,000. Its members are very successful at adapting in aquatic and terrestrial environments. Characteristics of the phylum Chordata are: 1. They are…
PHYLUM HEMICHORDATA (lmni, half + chorda, cord)
PHYLUM HEMICHORDATA (hemi, half + chorda, cord) The phylum Hemichordata includes the acorn worms (class Enteropneusta) and the pterobranchs (class Pterobranchia. Members of both classes live in or on marine…
Hemichordata & Chordata classification & examples
CLASSIFICATION OF HEMICHORDATA & CHORDATA Phylum Hemichordata Hemichordates are widely distributed in shallow, marine and tropical waters. They are present in deep and cold waters. They have soft and wormlike…
Chapter 11 HEMICHORDATA & CHORDATES
HEMICHORDATA & CHORDATES EVOLUTIONARY PERSPECTIVE Hemichordata have some most familiar animals. We are familiar with them because we are members of phylum Chordata. Other members of these phyla are much…