Diversity in Living World
- Consider following features :(a) Organ system level of organisation(b) Bilateral symmetry(c) True coelomates with segmentation of bodySelect the correct option of animal groups which possess all the above characteristics. Answer: 1. Annelida, Arthropoda and Chordata We need a group with organ-system organisation, bilateral symmetry and a true coelom with segme... 1
- Which of the following animals does not undergo metamorphosis ? Answer: 1. Earthworm Key idea: Metamorphosis is a change from larva to adult. Moths (caterpillar), tunicates (tadpole-like larva) and starfi... 1
- Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system. Answer: 2. Aves Key idea: Birds (Aves) have a crop to store food and a gizzard to grind it. Their digestive tract is adapted to flight and a... 1
- Which one of these animals is not a homeotherm ? Answer: 3. Chelone Key idea: Homeotherms (warm-blooded) keep constant body temperature: birds and mammals. Macropus (kangaroo) and Camelus (... 1
- In case of poriferans, the spongocoel is lined with flagellated cells called : Answer: 2. choanocytes The spongocoel of sponges is lined by flagellated choanocytes (collar cells). Their beating drives water through the... 1
- Which among these is the correct combination of aquatic mammals ? Answer: 2. Whales, Dolphins, Seals Aquatic mammals are mammals that live in water: whales, dolphins and seals. Trygon (sting ray) and sharks... 1
- Which of the following represents order of 'Horse' ? Answer: 1. Perissodactyla Key idea: The classification of the horse is: Kingdom Animalia, Phylum Chordata, Class Mammalia, Order Perissodact... 1
- An important characteristic that Hemichordates share with Chordates is : Answer: 2. pharynx with gill slits Key idea: Hemichordates (e.g. Balanoglossus) share pharyngeal gill slits with chordates. (1) Hemichordate... 1
- Match Column—I with Column—II for housefly classification and select the correct option using the codes given below :Column—I: a. Family; b. Order; c. Class; d. PhylumColumn—II: (i) Diptera; (ii) Arthropoda; (iii) Muscidae; (iv) InsectaCodes :a b c d Answer: 4. (iii) (i) (iv) (ii) The housefly is classified as: Phylum Arthropoda (ii), Class Insecta (iv), Order Diptera (i), Family Muscidae... 1
- Choose the correct statement. Answer: 1. All cyclostomes do not possess jaws and paired fins. Cyclostomes (lampreys, hagfishes) have no jaws and no paired fins. Correct.... 1
- In male cockroaches, sperms are stored in which part of the reproductive system? Answer: 4. Seminal vesicles In a male cockroach, the testes make sperm, which pass through the vasa deferentia to the seminal vesicles, wher... 1
- Which of the following characteristic features always holds true for the corresponding group of animals ?(1) Cartilaginous endoskeleton | Chondrichthyes(2) Viviparous | Mammalia(3) Possess a mouth with an upper and a lower jaw | Chordata(4) 3 - chamb… Answer: 1. Cartilaginous endoskeleton - Chondrichthyes Class Chondrichthyes (sharks, rays) always has a cartilaginous endoskeleton. 2: Not a... 1
- Which one of the following characteristics is not shared by birds and mammals ? Answer: 3. Viviparity Both birds and mammals have a bony endoskeleton, breathe with lungs and are warm blooded. Viviparity (giving birth to... 1
- Which of the following features is not present in *Periplaneta americana* ? Answer: 2. Indeterminate and radial cleavage during embryonic development Key idea: Cockroach (Periplaneta) is a protostome arthropod, so it... 1
- Which of the following features is not present in the Phylum - Arthropoda ? Answer: 3. Parapodia Key idea: Arthropods have a chitinous exoskeleton, a metamerically segmented body and jointed appendages. Parapodia are... 1