Two commons characters found in centipede, cockroach and crab are
compound eyes and anal cerci
jointed legs and chitinous exoskeleton
green gland and tracheae
green gland and tracheae
B.
jointed legs and chitinous exoskeleton
Crab, centipede and cockroach belong to phylum Arthropoda. These have jointed appendages and chitinous exoskeleton.
Frog's heart when taken out of the body continues to beat for some time
Select the best option from the following statements
(a) Frog is a poikilotherm
(b) Frog does not have any coronary circulation
(c) Heart is 'myogenic' in nature
(d) Heart is autoexcitable
Only (c)
Only (d)
(a) & (b)
(a) & (b)
Which of the following represents order of 'Horse'?
Equidae
Perissodactyla
Caballus
Caballus
In case of poriferans the spongocoel is lined with flagellated cells called :
Ostia
Oscula
Choanocytes
Choanocytes
In which one of the following sets of animals do all the four give birth to young ones?
Lion, bat, whale, ostrich
Platypus, penguin, bat, hippopotamus
Shrew, bat, cat, kiwi
Shrew, bat, cat, kiwi
