Which one of the following group of animals is homeothermic?
Reptiles
Amphibians
Birds
Fishes
C.
Birds
Birds, humans and other mammals can maintain their body temperature irrespective of external temperature variation, i.e. they are warm blooded (homeothermic) animals. While, all reptiles, insects, amphibians and fishes are cold-blooded (poikilothermic) animals. These animals cannot control their body temperature, i.e. their body temperature varies considerably.
Which of the following represents the class of Tubifex?
Echiurida
Archiannetida
Hirudinea
Oligochaeta
Which one of the followings is not a characteristic feature of mammals?
Diphyodont tooth
Ten pairs of cranial nerves
Seven cervical vertebrae
Left aortic arch in the circulatory system
The largest type of nematocysts in Hydra is
Holotrichous isorhizas
Atrichous isorhizas
Desmonemes
Stenoteles
Receptacle of antheridiophore and archegoniophore of Marchantia respectively are
8 lobed, 9 rays
6 lobed, 4 rays
9 lobed, 5 rays
2 lobed, 6 rays
Which one of the following matching pairs is incorrect?
Shell fish - Pisces
Silver fish - Arthropoda
Cuttle fish - Mollusca
Star fish - Echinodermata
Select the mismatch from those given below.
Noctiluca bioluminescence
Gonyaulax catenella saxitoxin
Pyrodinum red tide
Ceratium-zygotic meiosis
Antelope cervicapra is
a mammal
commonly known as black back
an animal under data deficient category of wildlife
a threatened Indian wildlife
Which one of the following matching pairs is incorrect?
Mollusca - Pseudocoel
Cnidaria - Nematocyst
Annelida - Chloragogen cells
Echinodermata - Water vascular system
