Class Crustacea has following features :
Cephalothorax, book lungs, chitinous exoskeleton
Head and thorax, biramous appendages, book lungs
Head and thorax, book lungs, chitinous exoskeleton
Cephalothorax, biramous appendages, gills
D.
Cephalothorax, biramous appendages, gills
Crustaceans are marine organisms but few live in freshwater or moist places. Their body consists of cephalothorax and abdomen. Each body segment bears a pair of biramous appendages. Respiration occurs through body surface or gills. Excretion occurs through green glands. They bear two pairs of antennae.
The sites of the first, second and third moulting of the Ascaris larva are respectively
soil, lung and intestine
liver, stomach and intestine
soil, alveoli and alveoli
soil, intestine and lung
As per classification which of the following is correct ?
Ascaris, Pheretima, Grasshopper
Hydra, Pterido, Leucosolenia
Starfish, Grasshopper, Solen
Pila, Dentalium, Octopus
Which of the following Phyla are included in Enterozoa?
Annelida, Mollusca, Porifera
Echinodermata, Hemichordata, Porifera
Mollusca, Arthropoda, Hemichordata
Porifera, Mollusca, Arthropoda
Identify the correct statement
In amniotes last nerve is spinal accessory
In non- amniotes last nerve is vagus.
Optic is shortest nerve
Olfactory nerves has mixed fibres.
Ambulacral grooves are absent in the living forms of the Class
Crinoidea
Asteroidea
Ophiuroidea
Echinodermata
In which of the following class of Annelida, one pair ovaries and several pair testes are found ?
Archiannelida
Hirudinea
Oligochaeta
Polychaeta
