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
______________ is a molluscan group which possess eyes resembling vertebrate eyes.
Bivalvia
Gastropoda
pelecypoda
cephalopoda
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
Trachea of cockroach and mammal are similar in having ____________.
paired nature
non - collapsible walls
ciliated inner lining
origin from head
From the following statements select the wrong one.
Millipedes have two pairs of appendages in each segment of the body
prawn has two pairs of antennae
Animals belonging to phylum - proifera are exclusively marine
Nematocysts are characteristic of the phylum - Cnidaria
