Which of the following animals has a tetramorphic colony?
Velella
Physalia
Obelia
Porpita
B.
Physalia
Physalia is tetramorphic in nature, it consists of
(i) a small dactylozooid with a long slender tantacle.
(ii) a gastrozooid with mouth but no tentacle.
(iii) a branched gonozooid, which bears both male and female gonophores.
(iv) a large dactylozooid with an enormous nematocyst bearing fishing tentacle.
All chordates at one or other stage possess
two pairs of pentadactyl limbs
pharyngeal gill slits
movable jaw
vertebral column
Haemocyanin pigment is found in which of the following animal group?
Annelida
Insects
Lower invertebrates
Platyheliminthes
Ornithorhynchus is a connecting link between
fishes and amphibians
Annelida and Arthropoda
Annelida and Mollusca
reptiles and mammals
A fish introduced into a water body to control mosquito population is
Gambusia
Labeo
Notopterus
Fistularia
Mammals have
biconvex RBCs to increase the surface area
biconcave RBCs to increase the surface area
spherical RBCs to increase the surface area
no RBCs
Aristotle's lentern is
pedicellariae in Pycnopodia
arval form in Antedon
pressure equalisation plate in Asterias
masticatory organ in the digestive tract of sea urchin
Identify the incorrect match
Mulberry silk - Bombyx mori
Tasar silk - Antheraea pernyi
Muga silk - Antheraea assama
Eri silk - Attacus ricini
