Question 8

Oak Tree is composed of cells with walls.

The oak tree is an organism that has cells with rigid cell walls made of cellulose, which provides structural support and protection. This characteristic distinguishes it from the other organisms listed.

A) Domestic Cat

Domestic cats are mammals, and their cells do not have cell walls. Instead, they have flexible plasma membranes that allow for a range of cellular functions, which is typical for animal cells.

B) Protozoa

Protozoa are single-celled organisms that generally lack cell walls. Instead, they possess flexible membranes that enable them to change shape and move, which is a key characteristic of their biology.

C) Human

Humans, like other animals, are composed of cells that do not have cell walls. Human cells have a plasma membrane, which allows for various cellular processes but lacks the rigidity of a cell wall.

D) Oak Tree

The oak tree is composed of cells that have rigid cell walls made of cellulose. This characteristic is essential for providing plants with structural integrity and support, enabling them to grow upright and withstand environmental pressures.

Conclusion

The oak tree is the only organism listed that possesses cells with walls, specifically made of cellulose, which is a fundamental aspect of plant biology. In contrast, the domestic cat, protozoa, and humans all have cell structures that do not include walls, highlighting the unique characteristics of plant cells compared to animal and protozoan cells.