In the context of environmental pollution, 'Minamata disease' in Japan was caused by the severe contamination of water with: MCQ with Answer and Explanation

In the context of environmental pollution, 'Minamata disease' in Japan was caused by the severe contamination of water with:
A. Arsenic
B. Lead
C. Cadmium
D. Methylmercury
Answer: Option D
Solution (By JKSSB Mock Tests)
Minamata disease is a severe neurological syndrome caused by severe mercury poisoning. It was first discovered in Minamata city, Kumamoto prefecture, Japan, in 1956. It was caused by the release of methylmercury in the industrial wastewater from the Chisso Corporation's chemical factory, which contaminated the local bay and the fish and shellfish. People who consumed the contaminated seafood suffered from severe neurological damage, including ataxia, numbness, and muscle weakness.

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Practice More Biology Questions

Question #1
Consider statements about plant biology: 1. Transpiration occurs through stomata. 2. Guttaion occurs through hydathodes. 3. Phloem transports water upwards. Which are correct?
A. 1 and 3 only
B. 1 and 2 only
C. 1, 2 and 3
D. 2 and 3 only

Correct Answer: Option B


Explanation:
Transpiration is the loss of water vapor primarily through the stomata on the leaf surface. Guttation is the exudation of liquid water from the margins of leaves through specialized structures called hydathodes, usually at night when root pressure is high. Phloem is responsible for the translocation of organic food (bidirectional), while xylem transports water and minerals upwards. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology
Question #2
The part of the seed that provides nutrition to the developing embryo is:
A. Plumule
B. Endosperm
C. Radicle
D. Seed coat

Correct Answer: Option B


Explanation:
The endosperm is a triploid tissue in angiosperm seeds that stores starch, proteins, and lipids to nourish the embryo during germination. It is formed by double fertilization. In some seeds (e.g., legumes) the endosperm is absorbed and the cotyledons become storage organs. The seed coat protects.

This question belongs to: Science Biology
Question #3
The process that moves food through the esophagus by rhythmic contractions is:
A. Emulsification
B. Peristalsis
C. Mastication
D. Segmentation

Correct Answer: Option B


Explanation:
Peristalsis is a wave-like series of muscular contractions and relaxations that propels food through the digestive tract. Segmentation mixes contents in the intestine, emulsification breaks fat globules, mastication is chewing.

This question belongs to: Science Biology