MCQ
Main source of amoebic dysentery is
- AContaminated food and water
- ✓Water and food contaminated by the faecal matter
- CWater and food contaminated by urine
- DWater and food contaminated by polluted air
✓
Answer
Correct option: B.
Water and food contaminated by the faecal matter
b
Amoebic dysentery is caused by an intestinal endoparasite, Entamoeba histolytica, found in large intestine of humans. Infection takes place through contaminated food and water
Amoebic dysentery is caused by an intestinal endoparasite, Entamoeba histolytica, found in large intestine of humans. Infection takes place through contaminated food and water
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Select the correct option.Direction of Direction of reading of $RNA$ synthesis the template $DNA$ strand
→| Direction of $RNA$ synthesis | Direction of reading of the template $DNA$ |
| $(a)$ $5'-3'$ | $3'-5'$ |
| $(b)$ $3'-5'$ | $5'-3'$ |
| $(c)$ $5'-3'$ | $5'-3'$ |
| $(d)$ $3'-5'$ | $3'-5'$ |
→
Normally the number of chromosomes in the nuclei of gametes, that fuse at fertilization are
Population growth is reduced by the environmental resistance. This phase is
Given population growth curve represents the logistic growth curve. In this curve find out what does $A, B$ and $C$ indicates
→Assertion : Cross of $F_1$ individual with recessive homozygous parent is test cross.
→Reason : No recessive individual are obtained in the monohybrid test cross.
The colonisation of tropical........ by humans is said to have led to the extinction of more than 2000 species of native birds.
If the plant producer dies in the ecosystem, then the system is
In an angiospermic plant, endosperm is formed due to fertilization of secondary nucleus but it is absent in some of the seeds viz. pea, bean, phaseolus (moong) etc. It is due to lack of
Species diversity is least in: