15373.Earthworms eliminate cellular wastes and excess water through excretory tubules called ______.
Nephridia
Flame cells
Coelom
Gizzard
15375.In planarians water enters the body by ______.
osmosis
contractile vacuoles
flame cells
active transport
15376.A phenomenon when parasite parasitizes themselves is known as
Hyperparasitism
Parasitoids
Monoxenous parasitism
Polyxenous parasitism
15378.All flat worms differ from all round worms in having
Triploblastic body
Solid mesoderm
Bilateral symmetry
Metamorphosis in the life history
15379.Which one of the following is the true description about an animal concerned?
Cockroach – 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
Earthworm – The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
Frog – Body divisible into three regions - head, neck and trunk
Rat – Left kidney is slightly higher in position than the right one
15380.Phylum mollusca can be distinguished from other invertebrates by the presence of
Bilateral symmetry and exoskeleton
A mantle and gills
Shell and non-segmented body
A mantle and non-segmented body
15381.Order Rhynchocephalia consists of
Tuataras
Lizards and snakes
Turtles and tortoises
Crocodiles, alligators, caimans
15382.When tail is cylindrical and ventral scales do not extend the entire width of belly the snake is
definitely poisonous
can be poisonous or non poisonous
non-poisonous
deadly poisonous
15383.Cnidarians having cells called cnidocytes, contain organelles known as ______.
Polymorphism
Nematocysts
Hermaphroditism
None of these
15384.The metamorphosis of insects appears to be regulated through
Thyroxine
Haemolymph
Ecdysone
All the above
15385.Which one of the following statements about certain given animals is correct?
Flat worms (Platyhelminthes) are coelomates
Round worms (Aschelminthes) are pseudocoelomates
Mollusks are acoelomates
Insects are pseudocoelomates
15388.Cold-blooded animals fall into which category?
Ectotherms
Psychrotherms
Endotherms
Thermophiles
15389.One example of animals having a single opening to the outside that serves both as mouth as well as anus is
Fasciola
Octopus
Asterias
Ascidia
15391.Which one of the followings belongs to platyhelminthes?
Plasmodium
Trypanosoma
Schistosoma
Wuchereria