A Level Biology Practice Exam

Parenchyma is indeed a type of packing tissue that fills spaces within plant structures. It is one of the fundamental tissue types in plants and serves several roles, including storage, support, and photosynthesis. The cells of parenchyma are typically large, with thin walls and a living protoplast, allowing them to store nutrients, water, and starch.

This tissue is generally found throughout the plant, including in the cortex of stems and roots, as well as in the mesophyll of leaves. Its flexible nature enables it to adapt to various functions, such as healing wounds or participating in gas exchange.

While the other options relate to different types of plant tissues, they do not accurately describe parenchyma. Conducting tissues are involved in transporting water and nutrients; protective layers serve to shield against environmental hazards; and root tissues focused on anchorage specialize in supporting the plant's stability and nutrient absorption.