Why must animals eat other organism to survive?

Animals must eat other organisms to survive because they lack the ability to produce their own food through photosynthesis like plants do. This means they need to consume other organisms to obtain the necessary energy and nutrients for:

1. Energy Production:

* ATP: Animals need energy to carry out essential life processes like movement, growth, repair, and reproduction. This energy comes from breaking down food molecules and converting them into ATP (adenosine triphosphate), the energy currency of cells.

2. Building Blocks:

* Macromolecules: Animals need building blocks to create their own tissues and structures. They get these from food in the form of:

* Proteins: Used for building muscles, enzymes, hormones, and other important structures.

* Carbohydrates: Provide quick energy and are essential for cell function.

* Lipids (fats): Provide long-term energy storage, insulation, and protect vital organs.

* Nucleic acids: Essential for genetic material (DNA and RNA) and many cellular processes.

3. Essential Vitamins and Minerals:

* Micro-nutrients: Animals need various vitamins and minerals that they cannot produce themselves. These are crucial for regulating bodily functions, supporting immune systems, and maintaining overall health.

In summary:

Animals are heterotrophs, meaning they rely on consuming other organisms for their energy and nutritional needs. This is why they must eat other organisms to survive.