CBSE Questions for Class 11 Medical Biology Animal Kingdom Quiz 1 - MCQExams.com

• Whale is a mammal.
• Cuttlefish is a mollusc.
• Silver fish is an arthropod.
• Flying fish is true fish. It belongs to family Exocoetidae. Flying fishes are found in warmer climate. They have large pectoral fins and forked tail. 
• Thus, the correct answer is option D.

• All vertebrates have a muscular chambered heart. 
• Fishes have a two chambered heart with a single atrium and a ventricle. 
• In fishes, the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart (single circulation).
• Thus, the correct answer is option A.

Bats are the only mammals capable of flying. They find shelter in caves, crevices, tree cavities and buildings. They have evolved a specialized system, known as echolocation. They emit sounds that bounce off objects in their path, sending echoes back to the bats. From these echoes, the bats can determine the size of objects, how far away they are, how fast they are traveling and even their texture. Hence, option B is correct.

Among vertebrates, birds and mammals possess a four-chambered heart, e.g. sparrow, cat, humans, etc.  All reptiles have a three-chambered heart with an exception of the crocodile which has a four-chambered heart. Since the cobra is a reptile, its heart is three-chambered. Therefore, the correct answer is option C.

• Mammals are the warm-blooded vertebrate animal that is distinguished by the possession of hair or fur, females that secrete milk for the nourishment of the young. They give birth to young ones so they are known as viviparous.
• Reptiles and birds lay eggs, i.e., oviparous animals.

• Broad paired fins and caudal fin.
• Gills are not covered by an operculum (gill cover).
• Exoskeleton contains placoid scales which are dermal in origin.
• Mouth is ventral.

• Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. Whales are creatures of the open ocean; they feed, mate, give birth, suckle and raise their young at sea. So extreme is their adaptation to life underwater that they are unable to survive on land.
• Whales are warm-blooded animals, they breathe air, have hair, and females feed their babies with milk from mammary glands. Hence they belong to the group of vertebrates called mammals.
  
• So, the correct answer is 'Mammals'.

• Fish take in oxygen-rich water through their mouths and pump it over their gills. As water passes over the gill filaments, blood inside the capillary network picks up the dissolved oxygen. The circulatory system then transports the oxygen to all body tissues and ultimately, to the cells. 
• Hence, the fishes have lungs for respiration is an incorrect statement.
• So, the correct answer is 'False'.

• The lateral line system is an aquatic adaptation that helps aquatic animals to detect vibrations and movements in the water. 
• It is absent in terrestrial vertebrates like reptiles, frogs, and men.