The largest type of nematocysts in Hydra is
Holotrichous isorhizas
Atrichous isorhizas
Desmonemes
Stenoteles
D.
Stenoteles
Stenoteles or penetrants are the largest type of nematocysts in Hydra. The thread tube is open at the end. When discharged, it release thread tube by which a poisnous fluid, hypotoxin is injected paralysing the prey.
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
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?
Shell fish - Pisces
Silver fish - Arthropoda
Cuttle fish - Mollusca
Star fish - Echinodermata
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 of the following represents the class of Tubifex?
Echiurida
Archiannetida
Hirudinea
Oligochaeta
