biology mcqs
An extensive multiple-choice question test covering the diversity of the living world, biological classification systems, and detailed characteristics of the five kingdoms (Monera, Protista, Fungi, Plantae, and Animalia) including viruses, viroids, prions, and lichens, designed for competitive exam preparation.
Showing questions 161 - 168 of 168
161. Which class of vertebrates comprises all living members that are ectoparasites on some fishes and have a sucking and circular mouth without jaws?
162. Fishes with a cartilaginous endoskeleton, a ventral mouth, and persistent notochord throughout life belong to which class?
163. Which group of fishes possesses an air bladder that regulates buoyancy?
164. Amphibians are characterized by a three-chambered heart. How many auricles and ventricles do they have?
165. Which class of reptiles is notable for having a four-chambered heart, unlike most other reptiles?
166. Birds (Aves) possess several modifications for flight. Which of the following are adaptations for flight in birds?
167. The most unique mammalian characteristic is the presence of:
168. Which of the following mammals is an exception to the general viviparous nature of the class?