Activity 8 Examine micrographs of plant 1. \( \begin{array}{l}\text { Figure } 15 \text { shows plant cells from a leaf. } \\ \text { These particular cells are specialised for } \\ \text { photosynthesis. } \\ \text { a) State Two reasons why you know } \\ \text { this micrograph shows plant cells. } \\ \text { hat cover } \\ \text { gans and } \\ \text { b) } \\ \text { Draw two whole cells of leaf tissue. } \\ \text { Provide your diagram with labels } \\ \text { and a heading. }\end{array} \) c) A leaf is a collection of tissues that perform a specific function. State whether a leaf is a system or an organ. Explain your answer.

Plant cells are known for their distinctive features, which readily identify them in micrographs. Firstly, these cells possess a rigid cell wall composed of cellulose, providing structural support. Secondly, the presence of chloroplasts—those little green powerhouses—indicates their role in photosynthesis, as they contain chlorophyll that captures sunlight for energy conversion. A leaf is classified as an organ because it is a collection of tissues working together to perform a specific function—in this case, photosynthesis. Unlike a system, which consists of multiple organs working interdependently (like the circulatory or digestive systems), an organ like a leaf has a defined structure, composed of various cell types, such as epidermal, mesophyll, and vascular cells, all serving the singular purpose of gas exchange and light absorption.