Multiple choice

Humans and animals for their nutrition, directly or indirectly, depend upon ______.

  1. plants

  2. their surroundings

  3. air

  4. aquatic animals

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nutrition is the sum total of the food requirements of the living organisms. Humans and animals cannot fulfill their nutritional requirements by making use of their surroundings. Even the aquatic animals depend upon plants as plants are the autotrophic organisms, which can prepare their food directly by using inorganic substances and surroundings. So, all the living organism directly or in directly depend on plants for nutrition. 

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