Question

Note the following features and choose the one applicable to Wuchereria bancrofti.
A)Coelozoic parasite
B)Histozoic parasite
C)Monogenetic parasite
D)Digenetic parasite
E)Monomorphic acoelomate parasite
F)Dimorphic pseudocoelomate parasite
a) B, C, F
b) B, D, F
c) A, C, F
d) B, C, E

Answer 1

Hint:Wuchereria bancrofti is a human parasite also known as the filarial worm that causes filariasis or elephantiasis which is spread through a vector i.e. mosquito Culex. The parasite once comes in contact with the human body causes lodgement in the lymphatic vessels. In its life cycle, it has two hosts - human and mosquito where human is the definitive host while the mosquito is the intermediate host.

Complete answer:
The parasite (Wuchereria bancrofti) once comes in contact with the human body causes lodgement in the lymphatic vessels. In its life cycle, it has two hosts - human and mosquito where human is the definitive host while the mosquito is the intermediate host.
A)Coelozoic parasites - are the parasites that live within the cavities of the body of the host.
B)Histozoic parasites- are the parasites that live between the cells of the tissues or organs of the host.
C)Monogenetic parasites- are the parasites that complete their life cycle in the body of a single host.
D)Digenetic parasites - are the parasites that complete their life cycle in the body of more than one host.
E)Monomorphic acoelomate parasite- is the parasite that is a hermaphrodite or monoecious i.e. it contains both male and female reproductive organs and is acoelomate which means it doesn’t possess anybody cavity.
F)Dimorphic pseudocoelomate parasite - the parasite is dioecious i.e. both male and female reproductive organs in different individuals and is pseudocoelomate which means it possesses a body cavity which is not derived from mesoderm.
Option (a): B, C, F
The parasite is not monogenetic but it is a histozoic, dimorphic pseudocoelomate organism.
Option (b): B, D, F
The parasite is histozoic, digenetic, and dimorphic pseudocoelomate. Histozoic as it resides in the lymphatic system of the host, digenetic as it needs two hosts to complete its life cycle and shows sexual dimorphism and is pseudocoelomate.
Option (c): A, C, F
The parasite is not coelozoic and monogenetic but it is a dimorphic pseudocoelomate organism.
Option (d): B, C, E
The parasite is not monogenetic and monomorphic acoelomate but it is a histozoic organism.
Thus, the correct Option is Option B- B, D, F.

Note: The adult filarial worm is smooth, long, slender, cylindrical in shape with round ends and white and transparent in appearance. Male and female adult worms can be differentiated as male is smaller in size than female and tail end is curved in male. Female worms are ovoviviparous i.e. producing young ones from eggs when they are ready to hatch within the body of the parent.