#human health and disease

ZOOLOGY

Which of the following diseases is caused by a protozoan?

Amoebiasis is caused by the protozoan Entamoeba histolytica, which infects the human intestine. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, physiology, human health and related concepts as per latest syllabus.

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ZOOLOGY

Which of the following diseases is caused by a helminth parasite?

Filariasis is caused by the helminth Wuchereria bancrofti, which affects the lymphatic system. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function, Topic: Structural organization and physiology.

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ZOOLOGY

Which of the following diseases is NOT caused by bacteria?

Malaria is caused by the protozoan Plasmodium, not bacteria. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Human Health and Disease, Topic: Immunity, diseases and health maintenance.

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ZOOLOGY

Which of the following diseases is caused by Plasmodium species?

Malaria is caused by Plasmodium species and is transmitted by female Anopheles mosquitoes. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Human Health and Disease, Topic: Immunity, diseases and health maintenance.

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ZOOLOGY

Which among the following is NOT a mode of HIV transmission?

HIV is not transmitted through casual contact like shaking hands; it spreads through blood, sexual fluids, and contaminated needles. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.

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ZOOLOGY

Which of the following is an example of passive immunity?

Passive immunity occurs when pre-formed antibodies are directly introduced into the body, such as in tetanus antitoxin administration. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, physiology, human health and related concepts as per latest syllabus.

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