CHORDATES
1. The members of sub-phylum vertebrata posses notochord but all chordates are not vertebrates.
2. All vertebrates are chordates but all chordates are not vertebrates.
3. Chondrichthytes is osteichthytes are two classes belonging to division gnathostomata of vertebrates.
4. All living members of cyclostomata are ectoparasites on some fishes.
5. Due to absence of swim bladder,Dog fish has to swim constantly to avoid sinking.
6. In saw fish,teeth are modified placoid scales.
7. Labeo,Catla and clarius are fresh water bony fishes.
8. Cobra,krait and viper are poisnous snakes.
9. Reptiles,aves and Ornithorrhynchus are oviparous animals.
10.The long bones of birds are hollow with air cavities.
11.Macropus,Pteropus and delphinus are viviparous animals.
12.The most unique mammalian characteristics is presence of milk producing mammary glands.
13.The most primitive chordates are ectoparasites on fishes.
14.The most common species of frog found in India is Rana Tigerina commonly known as Indian Bullfrog.
15.Frogs are not seen during peek summer and winter as they shelter in deep burrows to protect them from extreme heat and cold.
16.The colour of dorsal side of body of frog is generally olive green with dark irregular spots.
17.The hind limbs of frog end in five digits,these are larger and muscular than forelimbs that end in four digits.
18.In male frog,copulatory pad is present on first digit of forelimbs.
19.In water,skin of frog acta as aquatic respiratory organ.
20.Buccal Cavity,skin and lungs act as respiratory organs when frog is on land.
21.In heart of frog,a triangular structure called sinus venosus joins right atrium.
22.In frog,thin walled urinary bladder is present ventral to the rectum which opens into cloaca
23.In frog,sensory papillae, taste buds and nasal epithelium are cellular aggregations around nerve endings.
24.In frog,mucous glands are present in skin which is highly vascularised and helps in respiration on water and on land.
25.Pisces,ambhicians and reptiles are cold blooded animals.
2. All vertebrates are chordates but all chordates are not vertebrates.
3. Chondrichthytes is osteichthytes are two classes belonging to division gnathostomata of vertebrates.
4. All living members of cyclostomata are ectoparasites on some fishes.
5. Due to absence of swim bladder,Dog fish has to swim constantly to avoid sinking.
6. In saw fish,teeth are modified placoid scales.
7. Labeo,Catla and clarius are fresh water bony fishes.
8. Cobra,krait and viper are poisnous snakes.
9. Reptiles,aves and Ornithorrhynchus are oviparous animals.
10.The long bones of birds are hollow with air cavities.
11.Macropus,Pteropus and delphinus are viviparous animals.
12.The most unique mammalian characteristics is presence of milk producing mammary glands.
13.The most primitive chordates are ectoparasites on fishes.
14.The most common species of frog found in India is Rana Tigerina commonly known as Indian Bullfrog.
15.Frogs are not seen during peek summer and winter as they shelter in deep burrows to protect them from extreme heat and cold.
16.The colour of dorsal side of body of frog is generally olive green with dark irregular spots.
17.The hind limbs of frog end in five digits,these are larger and muscular than forelimbs that end in four digits.
18.In male frog,copulatory pad is present on first digit of forelimbs.
19.In water,skin of frog acta as aquatic respiratory organ.
20.Buccal Cavity,skin and lungs act as respiratory organs when frog is on land.
21.In heart of frog,a triangular structure called sinus venosus joins right atrium.
22.In frog,thin walled urinary bladder is present ventral to the rectum which opens into cloaca
23.In frog,sensory papillae, taste buds and nasal epithelium are cellular aggregations around nerve endings.
24.In frog,mucous glands are present in skin which is highly vascularised and helps in respiration on water and on land.
25.Pisces,ambhicians and reptiles are cold blooded animals.