ECOLOGY
ECOSYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Photosynthesis
|
|
|
Respiration
|
|
|
Nitrogen fixation
|
|
|
Decay
|
Detailed explanation-1: -The correct answer is Photosynthesis. A food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the Sun to produce food (sugar) from carbon dioxide and water. The process by which plants make food is called photosynthesis.
Detailed explanation-2: -A food chain always starts with a producer, which is an organism that makes food. This is usually a green plant, because plants can make their own food by photosynthesis.
Detailed explanation-3: -So, the correct answer is ‘Photosynthesising organisms’
Detailed explanation-4: -Thus, autotrophs or plants take the first position in all the food chains and a food chain cannot exist without producers or plants.