Which one of the blood vessel may be considered as true heart in earthworm ?
Dorsal blood vessel
Ventral blood vessel
Supra oesophageal vessel
Anterior loop
Difference between larvae of culex and Anopheles is in the presence of:
Eyes
Tail
Respiratory tumpet
Curved body shape
Which one is a fixed larva?
Brachiolaria
Doliolaria
Pentacrinoid
Pluteus
Hydra can suddenly contract the body by:
Interstitial cells
Epithelio muscular cells
Nematoblasts
Nutritive muscular cells
The amphids are cuticular elevations on the ventrolateral lips of Ascaris. These are mainly :
Chemoreceptors
Gustoreceptors
Olfactroreceptors
Tactoreceptors
The chief advantage of encystment to an Amoeba is:
The change to get rid of accumulated waste products
The ability to survive during adverse physical conditions
The ability to live for some time without ingesting food
Protection from parasites and predators
Which one of the following parasites would not survive if there were no ponds and puddles with stagnant water?
Ascaris lumbricoides
Taenia solium
Trypanosoma gambiense
Wuchereria bancrofti
Cyclosis is a term referred to:
The active movement of paramecium
The active moment of the protoplasm in living cells
None of these
The active movement of blood cells
Pila is a member of which phylum?
Mollusca
Arthropoda
Annelida
Aschelminthes
Vestigal wings are found in:
Male periplaneta americana
Female periplaneta americana
Female blatta orientalis
Male Blatta orientalis
