Class Crustacea has following features:
(1) Cephalothorax, book lungs, chitinous exoskeleton
(2) Head and thorax, biramous appendages, book lungs
(3) Head and thorax, book lungs, chitinous exoskeleton
(4) Cephalothorax, biramous appendages, gills
Which of the following is wrongly matched?
(1) Haemoglobin in mammals – RBC
( 2) Haemozoin – Plasmodium cytoplasm
(3) Haemocyanin – leeches
(4) Haemoglobin dissolved in blood – Pheretima
Which of the following is correct about nematocyst?
(1) It can be re-used.
(2) It is excretory organ in arthropods
(3) It is ejected on contact and pierce the prey
(4) None of these
Ambulacral grooves are absent in the living forms of the Class
(1) Crinoidea
(2) Asteroidea
(3) Ophiuroidea
(4) Echinodermata
Which of the following Phyla are included in Enterozoa?
(1) Annelida, Mollusca, Porifera
(2) Echinodermata, Hemichordata, Porifera
(3) Mollusca, Arthropoda, Hemichordata
(4) Porifera, Mollusca, Arthropoda
Hydra receives impulses and stimuli through
(1) nerve net
(2) nematocytes
(3) sensory cells
(4) flame cells
Which one feature is common to leech, cockroach and scorpion?
(1) Nephridia
(2) Ventral nerve cord
(3) Cephalisation
(4) Antenna
Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?
(1) Morphallaxis - Regeneration of two transversel cut equal pieces of a Hydra into two small Hydras
(2) Epimorphosis - Replacement of old and dead erythrocytes by the new ones
(3) Morphallaxis - healing up of a wound in the skin
(4) Epimorphosis - Regeneration of crushed and filtered out pieces of a Planaria into as many new Planarians
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