Final answer:
Intermediate filaments are found in both plant and animal cells, while cell walls and cellulose are unique to plants. Animals have an extracellular matrix that includes collagen as a primary structural protein.
Step-by-step explanation:
Plants and animals both consist of complex cellular structures that differentiate them but also share some common features. For example, both plants and animals contain microtubules and intermediate filaments that play a crucial role in maintaining the cell's shape, structure, and division processes.
Intermediate filaments can be found in both plant and animal cells, providing tensile strength and aiding stress resistance. Some common types of intermediate filaments in animals include keratins, which strengthen hair and skin. Microtubules are also a universal feature of eukaryotic cells and are composed of tubulin. These play a part in cell division and structural integrity.
In contrast, cell walls and cellulose are typically found only in plant cells, offering rigidity and protection. Animals, on the other hand, do not have cell walls but possess an extracellular matrix (ECM) that contains collagen, which is essential for skin elasticity and the structural component of tissues.