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

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

Which one of the following matching pairs is incorrect?

• Mollusca - Pseudocoel

• Cnidaria - Nematocyst

• Annelida - Chloragogen cells

• Echinodermata - Water vascular system 

Select the mismatch from those given below.

• Noctiluca bioluminescence

• Gonyaulax catenella saxitoxin

• Pyrodinum red tide

• Ceratium-zygotic meiosis

The largest type of nematocysts in Hydra is

• Holotrichous isorhizas

• Atrichous isorhizas

• Desmonemes

• Stenoteles

Which of the following represents the class of Tubifex?

• Echiurida

• Archiannetida

• Hirudinea

• Oligochaeta

Bioluminescence is a characteristic feature of

• Diatoms

• Dinoflagellates

• Slime moulds

• Euglenoid

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 group of animals is homeothermic?

• Reptiles

• Amphibians

• Birds

• Fishes