Whales belong to class Mammalia while fishes are included in class Pisces. Both are aquatic animals and chordates. However, both differ in several basic characters, such as: (l) Whales are warm-blooded animals while fishes are cold-blooded. (ii) Whales respire through lungs while fishes respire throRead more
Whales belong to class Mammalia while fishes are included in class Pisces. Both are aquatic animals and chordates. However, both differ in several basic characters, such as: (l) Whales are warm-blooded animals while fishes are cold-blooded. (ii) Whales respire through lungs while fishes respire through gills. (iii) whales possess mammary glands which are absent in fishes. (iv) Whales have four chambered heart, while fishes have a two-chambered heart.
Protozoa are regarded as early or primitive animals because: (i) they exhibit a cellular level of organisation; (ii) the tissues, organs and organ systems have not developed in them; (iii) they are microscopic and exhibit a primitive mode of reproduction.
Protozoa are regarded as early or primitive animals because: (i) they exhibit a cellular level of organisation; (ii) the tissues, organs and organ systems have not developed in them; (iii) they are microscopic and exhibit a primitive mode of reproduction.
Bed bug (Cimex) is an insect because it possesses the basic characteristics of class Insecta, such as: (i) Three pairs of jointed thoracic legs. (ii) Its body is divisible into three parts -head, thorax and abdomen. (iii) The exoskeleton of bed bug is made up of chitin.
Bed bug (Cimex) is an insect because it possesses the basic characteristics of class Insecta, such as: (i) Three pairs of jointed thoracic legs. (ii) Its body is divisible into three parts -head, thorax and abdomen. (iii) The exoskeleton of bed bug is made up of chitin.
Whales look like fishes. They can swim in water like them but they are not fish as they respire with lungs, have four chambered heart, diaphragm, mammary gland, hairs, etc. Whales are viviparous like any other mammal.
Whales look like fishes. They can swim in water like them but they are not fish as they respire with lungs, have four chambered heart, diaphragm, mammary gland, hairs, etc. Whales are viviparous like any other mammal.
Flight adaptations of the birds are the following: (1) Forelimbs are modified into wings. (2) Body is covered with exoskeleton of water-proof and light-weight feathers. (3) Long bones of endoskeleton are pneumatic having air cavities. (4) A11 birds are toothless; their jaws are modified into horny bRead more
Flight adaptations of the birds are the following:
(1) Forelimbs are modified into wings.
(2) Body is covered with exoskeleton of water-proof and light-weight feathers.
(3) Long bones of endoskeleton are pneumatic having air cavities.
(4) A11 birds are toothless; their jaws are modified into horny beaks.
(5) Body is streamlined to reduce air resistance during its flight.
(6) Birds have air sacs helping in double respiration.
(7) Flights muscles are well developed.
(8) Tail feathers form a steering apparatus.
(9) Birds have a acute vision.
Why are whales not grouped in fishes?
Whales belong to class Mammalia while fishes are included in class Pisces. Both are aquatic animals and chordates. However, both differ in several basic characters, such as: (l) Whales are warm-blooded animals while fishes are cold-blooded. (ii) Whales respire through lungs while fishes respire throRead more
Whales belong to class Mammalia while fishes are included in class Pisces. Both are aquatic animals and chordates. However, both differ in several basic characters, such as: (l) Whales are warm-blooded animals while fishes are cold-blooded. (ii) Whales respire through lungs while fishes respire through gills. (iii) whales possess mammary glands which are absent in fishes. (iv) Whales have four chambered heart, while fishes have a two-chambered heart.
See lessWhy are protozoa are regarded as early animals?
Protozoa are regarded as early or primitive animals because: (i) they exhibit a cellular level of organisation; (ii) the tissues, organs and organ systems have not developed in them; (iii) they are microscopic and exhibit a primitive mode of reproduction.
Protozoa are regarded as early or primitive animals because: (i) they exhibit a cellular level of organisation; (ii) the tissues, organs and organ systems have not developed in them; (iii) they are microscopic and exhibit a primitive mode of reproduction.
See lessWins are absent in bed bug even then it is considered an insect. Why?
Bed bug (Cimex) is an insect because it possesses the basic characteristics of class Insecta, such as: (i) Three pairs of jointed thoracic legs. (ii) Its body is divisible into three parts -head, thorax and abdomen. (iii) The exoskeleton of bed bug is made up of chitin.
Bed bug (Cimex) is an insect because it possesses the basic characteristics of class Insecta, such as: (i) Three pairs of jointed thoracic legs. (ii) Its body is divisible into three parts -head, thorax and abdomen. (iii) The exoskeleton of bed bug is made up of chitin.
See lessWhy whales are not grouped in the fishes?
Whales look like fishes. They can swim in water like them but they are not fish as they respire with lungs, have four chambered heart, diaphragm, mammary gland, hairs, etc. Whales are viviparous like any other mammal.
Whales look like fishes. They can swim in water like them but they are not fish as they respire with lungs, have four chambered heart, diaphragm, mammary gland, hairs, etc. Whales are viviparous like any other mammal.
See lessList a few flight adaptations in birds.
Flight adaptations of the birds are the following: (1) Forelimbs are modified into wings. (2) Body is covered with exoskeleton of water-proof and light-weight feathers. (3) Long bones of endoskeleton are pneumatic having air cavities. (4) A11 birds are toothless; their jaws are modified into horny bRead more
Flight adaptations of the birds are the following:
See less(1) Forelimbs are modified into wings.
(2) Body is covered with exoskeleton of water-proof and light-weight feathers.
(3) Long bones of endoskeleton are pneumatic having air cavities.
(4) A11 birds are toothless; their jaws are modified into horny beaks.
(5) Body is streamlined to reduce air resistance during its flight.
(6) Birds have air sacs helping in double respiration.
(7) Flights muscles are well developed.
(8) Tail feathers form a steering apparatus.
(9) Birds have a acute vision.