Science 2

• I am metamerically segmented, blood sucking, ectoparasite. I have suckers. Who am I and to what phylum do I belong to?

  (a) Leech, Phylum Annelida
• (b) I have calcareous spines and I move with tube feet, which phylum do I belong to?

  (b) Echinodermata.
• (c) I have chitinous exoskeleton, I have three pairs of walking appendages, what phylum do I belong to?

  (c) Phylum: Arthropoda: Class : Insecta.
• (a) I have mammary glands and exoskeleton in the form of hair.

  (a) Class: Mammalta, Example: Cat, Dog, Man.
• (b) We form the highest number of animals on the planet. We have bilateral symmetry and our exoskeleton is in the form of chitin.

  (b) Phylum: Arthropoda, Example: Prawn, Crab.
• (c) I live in your small intestine, my body is long and thread like and pseudocoelomate.

  (c) Phylum: Aschelminthes. Example: Ascaris or round worm. Filarial worm.
• (3) Identify the class of given animals and write one characteristic of each animal:(d) Frog

  (d) Frog: Class Amphibia. Shows aquatic as well as terrestrial mode. Can breathe with lungs and skin. No exoskeleton and skin is slimy.
• (3) Identify the class of given animals and write one characteristic of each animal:(a) Kangaroo

  (a) Kangaroo : Class Mammalia. It is a marsupial animal with pouch for development of offspring Long hind limbs for jumping
• (3) Identify the class of given animals and write one characteristic of each animal:(c) Crocodile

  (c) Crocodile: Class Reptilia. It is a large animal seen near waterbodies. Can swim in water but cannot respire in water. Body covered with exoskeleton of scaly plates. Limbs very weak in comparison with huge bodies.
• (3) Identify the class of given animals and write one characteristic of each animal:(b) Penguin

  (b) Penguin: Class Aves. It is flightless bird. Body covered with thick feathery coat. Oviparous mode.
• (3) Identify the class of given animals and write one characteristic of each animal:(e) Sea-horse

  (e) Sea-horse: Class Pisces. Bony fish. Highly modified body structure showing brood pouch for development of offspring, gills for respiration, fins for swimming.
• (a) My body is divided into proboscis, collar and trunk. I am marine animal.

  (a) Balanoglossus: Phylum: Hemichordata.
• (b) I stay inside two shells. My body is divided into head, foot and visceral mass.

  (b) Bivalve or Oyster: Phylum: Mollusca.
• (c) I am male as well as female. I am endoparasite having a coelomate and bilaterally symmetrical and flattened body.

  (c) Liver fluke or tape worm: Phylum: Platyhelminthes.
• (d) I am sedentary marine animal drinking water all the time brough numerous pores on the body.

  (d) Sponge: Phylum: Porifera.
• (e) I am venomous, eight legged creature having chitinous exoskeleton.

  (e) Scorpion; Phylum: Arthropoda.
• (f) My body is covered by tunic. As a larva I swim but as an adult I settle down.

  (f) Doliolum or Salpa; Phylum: Chordata. Subphylum: Urochordata.