In Plasmodium, gametocytes are formed in man, but do not develop fully in the $R.B.Cs$. because of
Antibodies present in blood
Antigens present in blood
Higher temperature of blood
Lower temperature of blood
Identify $X$ from figure
Represent schematically the life cycle of a malarial parasite.
Entamoeba histolytica infection occurs through
Fish which eradicates the mosquito larva, is