Question 6

Oak Tree is composed of cells with walls.

The oak tree consists of cells that have rigid cell walls made of cellulose, which provide structural support and protection.

A) Human

Humans are composed of cells that do not have walls; instead, they have flexible membranes. Human cells are eukaryotic and lack the rigid structure that cell walls provide, which is typical of plant cells.

B) Oak Tree

The oak tree's cells are characterized by having walls made of cellulose, a key component that provides strength and rigidity. This structural feature is essential for the plant's growth and stability.

C) Domestic Cat

Domestic cats, like humans, have cells that are surrounded by a flexible plasma membrane and lack cell walls. Their cellular structure is typical of animal cells, which do not require the rigidity that cell walls provide.

D) Protozoa

Protozoa are unicellular organisms that also do not possess cell walls. Instead, they have flexible membranes that allow them to change shape and move, distinguishing them from plant cells which have rigid walls.

Conclusion

The oak tree is definitively the correct answer as it is the only organism listed that possesses cells with walls made of cellulose. The other options, including humans, domestic cats, and protozoa, do not have cell walls, emphasizing the unique structural characteristic of plant cells.