Plant and Animal Cells - Structure and Differences - Free ... - Free Printable

Problem Analysis:

The worksheet focuses on understanding the differences between plant and animal cells and labeling their structures. Let's break it down step by step.

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Task 1: Give two reasons why plant and animal cells are different.

#### Solution:
1. Cell Wall: Plant cells have a rigid cell wall made of cellulose, which provides structural support and protection. Animal cells do not have a cell wall.
2. Chloroplasts: Plant cells contain chloroplasts, which are organelles that perform photosynthesis (the process of converting light energy into chemical energy). Animal cells do not have chloroplasts.

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Task 2: Label the diagram below

#### Diagram Analysis:
The diagram shows two types of cells:
- Plant cell (on the left)
- Animal cell (on the right)

Some parts are labeled as "Plant and animal cells," while others are labeled as "Plant cell Only." We need to identify and label the structures accordingly.

#### Known Structures in Cells:
1. Common to Both Plant and Animal Cells:
- Nucleus
- Cytoplasm
- Cell membrane
- Mitochondria
- Endoplasmic reticulum
- Ribosomes
- Golgi apparatus

2. Unique to Plant Cells:
- Cell wall
- Chloroplasts
- Large central vacuole

#### Labeling the Diagram:

##### Plant Cell (Left Side):
1. Plant and animal cells:
- Nucleus: The control center of the cell, containing DNA.
- Cytoplasm: The gel-like substance inside the cell where most cellular activities occur.
- Mitochondria: Organelles responsible for producing energy (ATP) through cellular respiration.
- Endoplasmic Reticulum: A network of membranes involved in protein and lipid synthesis.
- Ribosomes: Small structures where proteins are synthesized.

2. Plant cell Only:
- Cell wall: The rigid outer layer providing structural support.
- Chloroplasts: Organelles containing chlorophyll for photosynthesis.
- Large central vacuole: A large sac that stores water, nutrients, and waste products and helps maintain turgor pressure.

##### Animal Cell (Right Side):
1. Plant and animal cells:
- Nucleus: The control center of the cell, containing DNA.
- Cytoplasm: The gel-like substance inside the cell where most cellular activities occur.
- Mitochondria: Organelles responsible for producing energy (ATP) through cellular respiration.
- Endoplasmic Reticulum: A network of membranes involved in protein and lipid synthesis.
- Ribosomes: Small structures where proteins are synthesized.

2. Animal cell Only:
- Centrioles: Present only in animal cells (not shown in the diagram but worth noting).

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Final Labels:

#### Plant Cell (Left Side):
1. Plant and animal cells:
- Nucleus
- Cytoplasm
- Mitochondria
- Endoplasmic Reticulum
- Ribosomes

2. Plant cell Only:
- Cell wall
- Chloroplasts
- Large central vacuole

#### Animal Cell (Right Side):
1. Plant and animal cells:
- Nucleus
- Cytoplasm
- Mitochondria
- Endoplasmic Reticulum
- Ribosomes

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Final Answer:

1. Two reasons why plant and animal cells are different:
- Plant cells have a cell wall, while animal cells do not.
- Plant cells contain chloroplasts for photosynthesis, while animal cells do not.

2. Labeling the diagram:
- Plant and animal cells:
- Nucleus
- Cytoplasm
- Mitochondria
- Endoplasmic Reticulum
- Ribosomes
- Plant cell Only:
- Cell wall
- Chloroplasts
- Large central vacuole

Final Boxed Answer:
\[
\boxed{
\text{1. Cell wall, Chloroplasts}
}
\]