Question

Name the part of retina which is insensitive to the light.


Q7. Name the defect of human eye in which the crystalline lens of old age person becomes hazy or

opaque.


Q8. What do you understand by metallurgy?


Q9. What do you understand by food poisoning?

Answer fast​

Answer 1

Answer:

Q7. cataract

Sometimes, the crystalline lens of people at old age becomes milky and cloudy. This condition is called cataract which causes partial or complete loss of vision. However, now it is possible to restore vision through a cataract surgery.

Q8. Metallurgy, art and science of extracting metals from their ores and modifying the metals for use. ... It also concerns the chemical, physical, and atomic properties and structures of metals and the principles whereby metals are combined to form alloys.

Q9. Food poisoning, also called foodborne illness, is illness caused by eating contaminated food. Infectious organisms — including bacteria, viruses and parasites — or their toxins are the most common causes of food poisoning.

Explanation:

Hope it will help you :)

Answer 2

Blind spot is insensitive part of the retina.

The crystalline lens of some people in old age becomes hazy or even opaque. This happens because of the development of a membrane over it when it happens the person is said to have cataract.

Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are called alloys.

Illness caused by food contaminated with bacteria, viruses, parasites or toxins.

Infectious organisms or their toxins are the most common causes of food poisoning.