Answer:

Kink should be present in the thermometer to avoid the opposite flow of mercury while reading the temperature

Caterpillars should not be touched with bare hands as they possess some toxins from their skins and is harmful to humans

Explanation:

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(i) Kink is present in clinical thermometer to prohibit the falling of mercury present in the capillary tube into the bulb ensuring that a person should get the correct reading even after taking the thermometer out from his/her mouth.

(ii) Caterpillars are cold blooded organisms. If we touch them with bare hands, the heat transferred to their body can be fatal for them.

Explanation

(i) Kink prevent the level of the mercury from falling when taken out of the mouth, it allows the level of the mercury to fall when taken out of the mouth. Mercury is used in clinical temperature and level of mercury rises very rapidly with small variation in temperature.

(ii) Caterpillars have small hairs on their skin which can cause sting or irritation when touched with bare hands. Some caterpillars release fluids which can be poisonous.