Coelom

Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined by mesoderm. Such animals are called (a) Acoelomate (b) Pseudocoelomate (c) Coelomate (d) Haemocoelomate

Ascaris is characterized by (a) Absence of true coelom but presence of metamerism (b) Presence of neither true coelom nor metamerism (c) Presence of true coelom but absence of metamerism. (d) Presence of true coelom and metamerism.

Choose the correct statement regarding 'coelom of Periplaneta americana A) The perivisceral cavity is not a true coelom B) It is not lined by peritoneum C) It is called as haemocoel D) Schicocoelom is restricted to gonads

Read the following match about phylum and it's one character : I. Annelida : First- time true coelom (schizocoelom) present in them. II. Arthropoda : Only metamerically segmented animals with haemocoel. III. Echinodermata : Have exoskeleton of calcareous ossicles and spines . IV. Hemichordata : Small worm-like marine animals with the notochord. How many from the above is/are correct

Consider following features: (a) Organ system level of organisation (b) Bilateral symmetry (c) True coelomates with segmentabon of body Select the correct option of animal groups which possess all the above characteristics.

You have discovered an animal having characters like, triploblastic, bilateral symmetry, coelomate, chitinous exoskeleton, head, thorax and abdomen as bidy parts, and jointed appendages. You should place the animal under

Select the set of incorrect statements. I. The circulatory system in Platyhelminthes has a single opening. II. Annelids are the first animals to have true coelom and metamerism (true segmentation). III. The space between the hump and the mantle is called the mantle cavity in which gills are present. IV. Most of the echinoderms are bisexual.

Read the following statements about phylum Annelida. Identify the true and false statements and select the correct option after referring to the given table . A. Annelids are diploblastic , metamerically segmented , coelomate animals. B. Their neural system consists of paired ganglia connected by lateral nerves to a single ventral nerve cord . C. They process longitudinal and circular muscle fibres which help in locomotion . D Nephridia help them in osmoregulation and excretion.

Read the featured given below and select the option for animals which correctly describes the features mentioned: I. All are exclusively marine, triploblastic, coelomate organism with a water vascular system. II. A small group of warm-like marine animals with the organ system levels of the organization. III. The body is covered by a calcareous shell and is unsegmented with a distinct head, muscular foot, and visceral hump. IV. Triploblastic, pesudocelomate animals in which alimentary canal is complete with a well developed muscular pharynx.