Under unfavourable conditions, the Amoeba reproduces by
binary fission
conjugation
encystment
endomixis
Correct Answer :
C. encystment
Related Questions
Highly polypoid meganucleus is present in
flagellates
ciliates
sporozoans
rhizopodans
The cysts of E.histolytica develop in an infected individual in the
intestinal wall
lumen of intestine
tissues of man
areas of metastatic inversion
Which of the following organelles are associated with defence in Protozoans ?
Nematocysts
Statocysts
Trichocysts
Otocysts
The zoological name of giant amoeba is
Amoeba proteus
Arcella sp.
Chaos chaos
Ovale sp.
Down stroke and recovery stroke are characteristic of
movement of pseudopodia
movement of flagella
movement of cilia
none of these
Attack of malaria occurs every fourth day when patient is infected by
Plasmodium ovale
Plasmodium malariae
Plasmodium falciparum
Plasmodium vivax
The cilia in Paramecium are
all equal
all unequal
longer at posterior side
longer at anterior side
The infective stage of Entamoeba histolytica is
sporozoite
minuta form
mature cyst
trophic form
Treatment of the infection by malarial parasite in the principal host is studied under
chemo-therapy
chemo-diagnosis
chemo-prophy laxis
prophylaxis
The disease caused by Trypanosoma cruzi is
sleeping sickness
chaga's disease
kala azar
oriental sore
Sporogony of malaria parasite occurs in
liver of man
RBC of man
stomach wall of mosquito
salivary glands of mosquito
Protozoa which completely lack trophj organelles are classifed under
sporozoa
rhizopoda
ciliophora
flagellata
Nuclear dimorphism is observed in
Entamoeba
Plasmodium
Paramecium
Trypanosoma
The function of neuro-motor system of Paramecium is
co-ordination of various external stimuli
co-ordination of ciliary beat
control of contractile vacuole
any of these
RBCs are found in the food vacuoles of
Amoeba proteus
Hydra viridissima
Leishmania donovani
Entamoeba histolytica
Encystment in Amoeba serves for
perennation
reproduction
dispersal
all of these
If a fresh water Amoeba for some reason in unable to form contractile vacuole, it will
stop forming pseudopodia
stop manufacturing metabolic water
burst consequent to osmotic swelling
become static for some time
Malignant tertian malaria is caused by
P. ovale
P.vivax
P. malariae
P. falciparum
The life cycle of Plasmodium in human blood is called
schizogony
syngamy
exo-erythro cytic schizogony
sporogony
Pseudopodia of Amoeba are important for
locomotion only
feeding only
both (a) and (b)
offence of defence
The intermediate host in the life cycle of �. histolytica is
Housefly
Mosquitoes
Tsetse fly
None of these
The path followed by a food vacuole in Paramecium is referred to as
cycloid
cyclic vascular path
cyclosis
cyclosphere
Entamoeba differs from Amoeba in not having
nucleus
pseudopodia
ectoplasm
contractile vascule
Erythrocytic cycle of Plasmodium produces
schizonts
sporozoites
merozoites
metacryptomerozoites;
The cell anus in some protozoans known as
cytoproct
peristome
cytostome
none of these
In Plasmodium, gametocytes are formed by j the trophozoites in the RBS of man. They do not develop fully in RBC because of
antibodies present in blood
antigens present in blood
higher temperautre of blood
lower temeprature of blood
The pseudopodia of Amoeba are meant for
feeding
offence and defence
locomotion
both (a) and (c)
African sleeping sickness or Gambiense fever is caused by
Entamoeba
Trypanosma
Leishmania
Trichomonas
Malarial parasites could best be obtained from a patient
an hour before rise of temperature
when temeprature rises with rigor
when temeprature comes down to normal
five hours after the temperature reaches normal level.
Sporozoites of Plasmodium vivax are produced from
ookinete
gametocytes
merozoites
sporoblasts