Title Animal Kingdom 4.0.pdf ✅

Animal Kingdom 3 (c) Coelomates : Animals possessing coelom i.e. the body cavity which is lined by mesoderm on all sides i.e. Annelida to Chordata 5. Body plan: (a) Cell-aggregate type – Body made of aggregate of cells which are not developed into tissues yet. e.g. Sponges : (b) Blind Sac type : Animals in which digestive system is incomplete, it has only single opening to the outside of the body that serves as both mouth and anus. e.g. Coelenterates to Platyhelminthes (c) Tube-within-tube type : Found in those animals having complete digestive tract i.e. with separate opening mouth and anus. e.g. Aschelminths to Chordates 6. Segmentation: Metameric segmentation : In Annelids, Arthropods and Chordates. In these animals, the body is externally and internally divided into segments with a serial repetition of at least some organs, this is called metameric segmentation and the phenomenon is known as Metamerism. 7. Notochord : It is a mesodermally derived rod-like structure formed on the dorsal side during embryonic development in some animals. (1) Non-chordates- Animals without notochord e.g. Porifera to Hemichordata (2) Chordates : Animals with notochord. eg. Phylum Chordata. 8. Circulatory system: (1) Open type - In which the blood remain filled in tissue spaces or blood sinuses due to absence of blood capillaries e.g. Arthropods, Molluscs, Echinoderms, Hemichordates and some lower Chordates like tunicates (2) Closed type : In which the blood is circulated through a series of vessels of varying diameters i.e. arteries, veins and blood capillaries e.g. Annelids, Cephalopod molluscs, Vertebrates etc. 9. Development: (a) Direct development - If larval stages are absent eg. : Earthworm. (b) Indirect development - If larval stages are present eg. : Flukes, Tape worm.
4 Animal Kingdom Echinodermata exhibits radial or bilateral symmetry depending on the stage. Figure 4.4 Broad classification of Kingdom Animalia based on common fundamental features The important characteristic features of the different phyla are described. 1. Which of the following statement is true? (1) Animal cells possess a cell wall (2) Animals are unicellular eukaryotes (3) Animals have autotrophic nutrition (4) All animals are heterotrophic 2. Match the phyla listed under column-I with the level of organization given under column-II, Choose the answer which gives the correct combination of the alphabets of the two columns: Column-I Column-II (Phylum) (Level of Organization) A Porifera p Tissue B Platyhelmilthes q organ C Cnidaria r Organ-system D Chordata s Cellular (1) A = s, B = q, C = p, D = r (2) A = q, B = r, C = s, D = p (3) A = s, B = r, C = q, D = p (4) A = r, B = q, C = s, D = p 3. Which type of symmetry is seen in a human face? (1) Radial symmetry (2) Asymmetry (3) Bilateral symmetry (4) Spherical symmetry 4. Segmentation is found in: (1) Platyhelminthes (2) Annelida (3) Mollusca (4) Hemichordata 5. Pseudocoelom is found in: (1) Platyhelminthes (2) Urochordata (3) Nematoda (4) Arthropoda Que. 1 2 3 4 5 Ans. 4 1 3 2 3 Concept Builder (Answer-Key) Concept Builder