Question

give scientific reasons​

Answer 1

Explanation:

Human beings are. called omnivores because we eat both animals[incases such as meat,fish etc] as well as plants[in cases such as vegetables,pulses etc].

It is not good to wash vegetables and fruits after cutting because there is a risk of losing all water soluble nutrients that are present in the particular fruits and vegetables . No it's good to wash fruits and vegetables before eating but not too much because it has water soluble vitamin - B and C.

A pace or a footstep cannot be used as a standard unit of length because the length of footstep, forearm length and hand span of different person is different. Since standard units must be similar at all places of world and in all kinds of conditions.

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Answer 2

ii) Give specific reasons for the following :

(a) Human beings are called Omnivores.

• Human beings are called Omnivores because they consume both plants and meats as their food.

(b) We should not wash the vegetables and fruits after cutting or peeling it.

• Vegetables and fruits should not be washed after cutting or peeling because washing after cutting can result in losing nutrients. And as a result we do not get any nutritions after eating them.

(c) A foot step or a pace is not used as a standard unit of length.

• A foot step or a pace is not used as the standard unit of length because everyone's foot step or pace is different. Hence, it will result in different length.

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• Omnivores :

Some Animals which intake both plants and animals as their food. These types of Animals are known as Omnivores.

• Washing Vegetables :

We can wash vegetables and fruits before cutting and peeling. This will remove the dirt not the nutrition.

• Standard unit of Length

Metre is known as Standard of Length.