Chart comparing biological and non-living items grouped by cells and atoms.

Problem Analysis:

The task involves analyzing two groups of items and determining which statement best describes the composition of these groups. The items in Group A and Group B are listed, and we need to decide whether they are made up of cells, atoms, or both.

#### Group A:
- Leaf of a plant
- Horse's muscle
- Cap of a mushroom
- Baby elephant
- Seed of a bean plant
- Blood

#### Group B:
- Spoonful of salt
- Piece of metal
- Diamond necklace
- Protein
- Sugar cube
- Air

Step-by-Step Solution:

#### 1. Understanding Cells and Atoms:
- Cells: These are the basic units of life. All living organisms (plants, animals, fungi, etc.) are composed of cells.
- Atoms: These are the basic building blocks of matter. Both living and non-living things are ultimately composed of atoms.

#### 2. Analyzing Group A:
- Leaf of a plant: This is part of a living organism and is composed of cells.
- Horse's muscle: Muscle tissue is part of an animal and is composed of cells.
- Cap of a mushroom: Mushrooms are fungi, and fungi are composed of cells.
- Baby elephant: Elephants are animals, and all animals are composed of cells.
- Seed of a bean plant: Seeds are part of plants and are composed of cells.
- Blood: Blood contains cells (e.g., red blood cells, white blood cells) and is part of a living organism.

Conclusion for Group A: All items in Group A are parts of living organisms and are therefore composed of cells.

#### 3. Analyzing Group B:
- Spoonful of salt: Salt is a compound (NaCl) and is composed of atoms.
- Piece of metal: Metals are pure elements or alloys and are composed of atoms.
- Diamond necklace: Diamonds are made of carbon atoms arranged in a specific crystal structure.
- Protein: Proteins are large molecules composed of amino acids, which are ultimately made up of atoms.
- Sugar cube: Sugar is a molecule (sucrose) composed of atoms.
- Air: Air is a mixture of gases (e.g., nitrogen, oxygen) composed of atoms.

Conclusion for Group B: All items in Group B are non-living substances and are composed of atoms.

#### 4. Matching the Statements:
- A: Both groups are made up of cells.
- Incorrect because Group B consists of non-living substances, which are not made up of cells.
- B: Both groups are made up of atoms.
- Incorrect because Group A consists of living organisms, which are made up of cells, not just atoms.
- C: Group A is made up of cells; Group B is made up of atoms.
- Correct. This matches our analysis: Group A (living organisms) is made up of cells, and Group B (non-living substances) is made up of atoms.
- D: Group A is made up of cells and atoms; Group B is made up of atoms.
- Incorrect because Group A is exclusively made up of cells, not atoms.
- E: Some things in Group A are made up of cells and some things in Group B are made up of atoms.
- Incorrect because all items in Group A are made up of cells, and all items in Group B are made up of atoms.
- F: Group A and Group B are made up of both cells and atoms.
- Incorrect because Group A is exclusively made up of cells, and Group B is exclusively made up of atoms.

Final Answer:

The statement that best describes the two groups is:

\boxed{C}

Explanation:

- Group A consists of parts of living organisms, which are composed of cells.
- Group B consists of non-living substances, which are composed of atoms.
- Therefore, the correct description is that Group A is made up of cells, and Group B is made up of atoms.