Which one of the animals possess nerve cells but no nerves?
Hydra
Tapeworm
Earthworm
Frog's tadpole
What is common in whale, bat and rat?
Absence of neck
Muscular diaphragm between thorax and abdomen.
Extra - abdominal tess to avoid high temperature of body
Presence of external ears
If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is called as _______________.
excretory fluid
coelomic fluid
haemolymph
Slimy mucus
Which one of the following is not a living fossil?
King crab
Sphenodon
Archaeopteryx
Peripatus
Moon Jelly fish belongs to the class ______________.
Hydrozoa
Scyphozoa
Anthozoa
None of these
Tube feet occurs in ________________.
cockroach
starfish
cattle fish
cat fish
Given below are four matching of an animal and its kind of respiratory organ.
silver fish - trachea
Scorpion - book lung
sea squirt - pharyngeal gills
dolphin - lungs
Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?
Liver fluke, sea anemone, sea cucumber - bilateral symmetry
Centipede, prawn, sea urchin - Jointed appendages
Scorpion spider cockroach - Ventral soild central nervous system
Cockroach locust Taenia - Metameric segmentation
