______ is a colorless, sticky film made of undigested food particles mixed with saliva and bacteria.

plaque

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enamel

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wisdom layer

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Solution

The correct option is A
plaque

Plaque is a sticky substance formed due to leftover food particles and salvia. If we don't brush properly after meals, it begins to form and build up on the teeth. This is harmful because plaque contains bacteria, which contribute to tooth decay and gum disease.

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Sticky film of saliva, food particles and bacteria is called plaque. Bacteria present in the plaque can only affect the teeth.

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If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.
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______ is a colorless, sticky film made of undigested food particles mixed with saliva and bacteria.

The correct option is A plaque Plaque is a sticky substance formed due to leftover food particles and salvia. If we don't brush properly after meals, it begins to form and build up on the teeth. This is harmful because plaque contains bacteria, which contribute to tooth decay and gum disease.

The correct option is A
plaque

Plaque is a sticky substance formed due to leftover food particles and salvia. If we don't brush properly after meals, it begins to form and build up on the teeth. This is harmful because plaque contains bacteria, which contribute to tooth decay and gum disease.