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-Dominant- [34]
3 years ago
15

What is the difference between a point source and a nonpoint source of water pollution? a a nonpoint source is easily identifiab

le. b point sources tend to be agricultural. c point sources can be targeted for reduction. d nonpoint sources tend to be factory outputs. e nonpoint sources are less harmful to the environment?
Biology
1 answer:
shutvik [7]3 years ago
8 0
The correct answer is. D)
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Answer:

i.   Name each of the parts labelled I, II, III, IV and V.

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I - Crown / Enamel

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III - Cement / Periodontal membrane

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I - Protects teeth from harmful bacteria

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III - hold tooth firmly (in socket / Jaw bone)

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iv  State three ways by which tooth decay may be prevented.

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→ avoid using sharp-pointed objects

→ avoid having dry mouth

→ use water containing fluorides to wash teeth / mouth

→ avoid smoking

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→ wash the mouth vigorously after each meal

→ regular visit to the dentist

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Explanation:

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