It is an exchange pool.
The source from which organisms generally take elements is called the environment. Organisms obtain essential elements such as carbon, hydrogen, oxygen, nitrogen, and phosphorus from air, water, soil, and other living organisms in their environment.
photoheterotroph
Trophic Levels
Organisms that hunt for their own food are called predators. They actively seek out and consume other organisms as a source of energy and sustenance.
Organisms that have the same food source and live in the same habitat are called competitors. They compete for limited resources such as food, water, and shelter, which can lead to adaptations and behaviors that help one species outcompete the other.
The source from which organisms generally take elements is called the environment. Organisms obtain essential elements such as carbon, hydrogen, oxygen, nitrogen, and phosphorus from air, water, soil, and other living organisms in their environment.
The primary energy source for most living systems is nutrients. Nutrients are elements and compounds that organisms consume and require for survival. Organisms need several dozen naturally occurring chemical elements to survive; among these are nitrogen, carbon, and phosphorus.
For machines it is called fuel and for living organisms it is called food.
photoheterotroph
Trophic Levels
The primary energy source for most living systems is nutrients. Nutrients are elements and compounds that organisms consume and require for survival. Organisms need several dozen naturally occurring chemical elements to survive; among these are nitrogen, carbon, and phosphorus.
Organisms that hunt for their own food are called predators. They actively seek out and consume other organisms as a source of energy and sustenance.
Autotrophs
Organisms that have the same food source and live in the same habitat are called competitors. They compete for limited resources such as food, water, and shelter, which can lead to adaptations and behaviors that help one species outcompete the other.
Basic source of variation in all organisms is mutation .
The source of energy for most organisms is chemical energy and sunlight.
Photosynthesis is the process by which plants and some microorganisms convert sunlight into chemical energy in the form of glucose. This energy is then used as the primary source of fuel for nearly all living organisms on Earth.