151. The skeleton of birds is light due to:
Answer: B. air spaces
Biology Class 11 Unit 10: Animalia MCQs
216 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 4 of 5.
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152. The heart of birds is:
Answer: C. four chambered with two atria and two ventricles
153. In birds only the ... aortic arch is present:
Answer: B. right
154. Birds are:
Answer: B. endothermic (warm blooded)
155. The voice box of birds is the:
Answer: B. syrinx
156. The muscular structure used for crushing food in birds is the:
Answer: B. gizzard
157. The main nitrogenous waste of birds is:
Answer: C. uric acid
158. Birds lack:
Answer: B. a urinary bladder
159. Running birds that lost the power of flight include:
Answer: B. Ostrich and kiwi
160. Respiration in birds is by:
Answer: C. lungs only, supplemented by air sacs
161. Reptiles, birds and mammals are collectively called:
Answer: B. amniotes
162. The amnion is:
Answer: B. a sac filled with fluid providing a private pond for the embryo
163. Mammals are characterized by:
Answer: B. mammary glands and hair
164. Mammalian skin is:
Answer: B. glandular with hair
165. The three ear ossicles of mammals are:
Answer: B. malleus, incus and stapes
166. The skull of mammals has:
Answer: B. two occipital condyles
167. The aortic arch in mammals is:
Answer: B. left only
168. Mammalian RBCs are:
Answer: B. non-nucleated
169. The voice apparatus of mammals consists of:
Answer: B. larynx and epiglottis
170. The three subclasses of mammals are:
Answer: B. Prototheria, Metatheria and Eutheria
171. Egg laying mammals belong to subclass:
Answer: C. Prototheria
172. Duckbill platypus and spiny anteater are:
Answer: C. monotremes
173. Monotremes are found in:
Answer: C. Australia
174. Pouched mammals belong to:
Answer: B. Metatheria
175. Kangaroo, koala and opossum are:
Answer: B. marsupials
176. The pouch of marsupials is called the:
Answer: B. marsupium
177. Young of marsupials are born:
Answer: B. immature and develop in the pouch
178. Placental mammals are the subclass:
Answer: C. Eutheria
179. In Eutheria the young develop:
Answer: C. inside the mother's body, depending on placenta
180. Placenta is an organ of exchange between:
Answer: B. maternal blood and fetal blood
181. In pangolin hair is modified into:
Answer: B. scales
182. In porcupine hair is modified into:
Answer: B. spines
183. Bat is:
Answer: C. a flying placental mammal
184. Whale and dolphin are:
Answer: B. placental mammals
185. The reptilian features of monotremes include:
Answer: C. laying of eggs and cloaca
186. The mammalian features of monotremes include:
Answer: C. mammary glands and hair
187. In the animal phylogenetic tree, the earliest branch is:
Answer: B. Porifera
188. Which of these has a gastrovascular cavity?
Answer: D. Hydra and flatworms
189. A landsnail, a clam and an octopus share:
Answer: C. a mantle
190. Which phylum has segmented bodies with a true coelom and closed circulation?
Answer: B. Annelida
191. In arthropods the open circulatory system has:
Answer: B. haemocoel connected with the blood vascular system
192. Insects are successful because of:
Answer: B. flight, chitinous exoskeleton and tracheal system
193. The animal belongs to:
Answer: B. Echinodermata
194. The sieve-like plate is the:
Answer: B. madreporite
195. The adult shows:
Answer: B. radial symmetry
196. It is the closest relative of the phylum:
Answer: B. Chordata
197. The phylum is:
Answer: C. Annelida
198. The segmentation seen is called:
Answer: B. metamerism
199. The cavity separating gut from body wall is a:
Answer: C. true coelom
200. The body cavity acts as a:
Answer: B. hydrostatic skeleton
About Biology Class 11 Unit 10 MCQs (Federal Board)
These 216 Biology MCQs cover Class 11 Unit 10: Animalia of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 5 pages of 50. Use the Print button to save this chapter as a PDF.