Page 76 - Biology - XII

VIVA VOCE

Q1. A patient discharges mucus and blood in his stool. Name the pathogen that causes this state.
Ans. E. histolitica infection
Q2. Mention the features of ringworm.
Ans. It has a waxy hyphae which is cotton like. The hyphae may appear white, yellowish brown to
reddish brown in colour.

Q3. Bad breath is because of __________ .
Ans. E. gingivalis infection in mouth (oral)
Q4. Name a common pathogen responsible for irregular bowel, anaemia in human.
Ans. Ascaris

Q5. Name the pathogenic protozoan that is found in human intestine causing amoebic dysentery.
Ans. Entamoeba histolytica

Q6. What are disease-causing organisms called in general?
Ans. Pathogens or causative agents
Q7. How are diseases identifi ed?
Ans. The diseases are identifi ed by the visible/non-visible symptoms (signs) of the patient.

Q8. What is the other name of Plasmodium?
Ans. Malarial parasite
Q9. What is amoebic dysentery?
Ans. Amoebic dysentery is a disease caused by Entamoeba histolytica.

Q10. Mention the systematic position of Ascaris.
Ans. Systematic position
Phylum – Aschelminthes Class – Nematoda Type – Ascaris lumbricoides

Q11. The protozoan parasite found in the RBCs of human due to Anopheles mosquito bite is _______.
Ans. Plasmodium

Q12. What are the diseases caused by pathogens called?
Ans. Pathogenic diseases or communicable diseases
Q13. Name a pathogenic protozoan.
Ans. Plasmodium

Q14. What is the symptom of Plasmodium infection in human?
Ans. High body temperature (103–105°F) after shivering of the patient.
Q15. What does Enta moeba gingivalis cause in human?
Ans. Diseased state of gums, pus in gums, and pyorrhoea.

Q16. What is the other name of Ascaris?
Ans. Roundworm
Q17. How does Ascaris infection take place in human?
Ans. Human become infected with Ascaris by consuming contaminated food and drinks, by playing in
soil, and by other unhygienic habits.

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