Question

Which of the following statements are true?

• A. All organisms directly or indirectly depend on plants for their food.
• B. Organisms that depend on other animals for their food are called herbivores.
• C. Nutrients from dead plants and animals are absorbed by green plants to perform photosynthesis.
• D. The first level of any food chain is always occupied by green plants.

Answer 1

Answer: (A), (C), (D)

The correct options are
A All organisms directly or indirectly depend on plants for their food.
C Nutrients from dead plants and animals are absorbed by green plants to perform photosynthesis.
D The first level of any food chain is always occupied by green plants.

$\bullet$ Green plants are called producers because they have the ability to trap energy i.e, sunlight and convert it into usable form as food. They are the primary sources of energy. Other organisms attain energy by consuming them. Hence, every organism depend directly or indirectly on plants and so they occupy the first level of any food chain.
$\bullet$ Decomposers act on dead living organisms and convert them into nutrient sources in soil. Plants absorb them from soil during the process of photosynthesis.