The basic requirement for the body size of an organism to increase involves several factors:

1. More energy in the form of ATP: ATP, or Adenosine Triphosphate, is the primary energy carrier in all living organisms. As an organism grows, its cells need more energy to function, which means they need more ATP.

2. Raw materials from the external environment: In order to grow, an organism needs raw materials like nutrients and water. These are typically obtained from the organism's environment.

3. A well-developed network of blood vessels: As an organism grows, its cells need more oxygen and nutrients, which are delivered by the blood. Therefore, a well-developed network of blood vessels is necessary to support growth.

4. The presence of a multicellular apparatus: Single-celled organisms have a limit to how much they can grow. Multicellular organisms, on the other hand, can grow much larger because they have specialized cells and structures that can support a larger body size.

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The basic requirement for the body size of an organism to increase involves several factors:

1. More energy in the form of ATP: ATP, or Adenosine Triphosphate, is the primary energy carrier in all living organisms. As an organism grows, its cells need more energy to function, which means they need more ATP.

2. Raw materials from the external environment: In order to grow, an organism needs raw materials like nutrients and water. These are typically obtained from the organism's environment.

3. A well-developed network of blood vessels: As an organism grows, its cells need more oxygen and nutrients, which are delivered by the blood. Therefore, a well-developed network of blood vessels is necessary to support growth.

4. The presence of a multicellular apparatus: Single-celled organisms have a limit to how much they can grow. Multicellular organisms, on the other hand, can grow much larger because they have specialized cells and structures that can support a larger body size.

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The basic requirement for the body size of an organism to increase involves several factors:

1. More energy in the form of ATP: ATP, or Adenosine Triphosphate, is the primary energy carrier in all living organisms. As an organism grows, its cells need more energy to function, which means they need more ATP.

2. Raw materials from the external environment: In order to grow, an organism needs raw materials like nutrients and water. These are typically obtained from the organism's environment.

3. A well-developed network of blood vessels: As an organism grows, its cells need more oxygen and nutrients, which are delivered by the blood. Therefore, a well-developed network of blood vessels is necessary to support growth.

4. The presence of a multicellular apparatus: Single-celled organisms have a limit to how much they can grow. Multicellular organisms, on the other hand, can grow much larger because they have specialized cells and structures that can support a larger body size.

The basic requirement for the body size of an organism to increase is:more energy in the form of ATPraw materials from the external environmenta well-developed network of blood vesselsthe presence of a multicellular apparatus

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