Questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Bats and whales are classified as mammals. Statement 2 : Bats and whales have four-chambered heart.
Solution
Bats and whales are the members of class Mammalia.The bats are the only mammals which have wings and can really fly while whales are the largest animals in existence. Both bats and whales have four chambered heart but birds and crocodiles also have four chambered heart.
Questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Birds have one ovary. Statement 2 :This reduces the body weight for flight.
Solution
Birds have many adaptations for flight. They have pneumatic bones and only one ovary which reduces the body weight.
Questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Sponges belong to Porifera. Statement 2 :Sponges have canal system.
Solution
Sponges belong to Porifera and they have characteristic canal system.
Questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Blood is colourless in the insects. Statement 2 : Insect blood has no role in O2transport.
Solution
Insect blood is colourless and does not play any role in transport of oxygen. Insects have tracheal respiration.
Which of the following statements are true/false?
(1)In Torpedo the electric organs are capable of generating strong electric shock to paralyze the prey.
(2)Bony fishes use pectoral, pelvic, dorsal anal and caudal fins in swimming.
(3)Amphibian skin is moist and has thick scales.
(4)Birds are poikilothermous animals.
(5)The most unique mammalian characteristic is the presence of milk producing mammary glands by which the young ones are nourished.
Which of the following statements is/are not true ?
(1)In Urochordata, notochord is present only in larval tail.
(2)In cephalochordata, notochord extends from head to tail region.
(3)Branchiostoma belongs to Hemichordata.
(4)Only one class of living members, class cyclostomata represents the super class agnatha
