Question

(a)	Obligatory anaerobe	(i)	Fasciola hepatica
(b)	Facultative anaerobe	(ii)	Antelope
(c)	Polyembryony	(iii)	Ascaris lumbricoides
(d)	Reservoir host	(iv)	Female Culex mosquito
(e)	Biological vector	(v)	Entamoeba histolytica

Match the following and find correct combination

• A. $a-v,b-ii,c-i,d-iii,e-iv$
• B. $a-v,b-iii,c-i,d-ii,e-iv$
• C. $a-iv,b-ii,c-i,d-iii,e-v$
• D. $a-iv,b-iii,c-i,d-ii,e-v$

Answer 1

The correct option is B $a-v,b-iii,c-i,d-ii,e-iv$

• Obligate anaerobes are poisoned by oxygen, so they gather at the bottom of the tube where the oxygen concentration is lowest. example: Entamoeba histolytica.
• Facultative anaerobes can grow with or without oxygen because they can metabolise energy aerobically or anaerobically. Example: Ascaris lumoricoides.
• Polyembryony is the phenomenon of two or more embryos developing from a single fertilized egg. Due to the embryos resulting from the same egg, the embryos are identical to one another but are genetically diverse from the parents. An example is Fasciola hepatica.
• Reservoir host is the host of an infection in which the infectious agent multiplies and/or develops, and on which the agent depends for survival in nature; the host is essential for the maintenance of the infection during times when the active transmission is not occurring. Examples of the reservoir host include humans, animals, and the environment
• Biological vectors, such as mosquitoes and ticks may carry pathogens that can multiply within their bodies and be delivered to new hosts, usually by biting.
• So, the correct answer is 'a-v,b-iii,c-i,d-ii,e-iv'.