A leaf contains palisade mesophyll, spongy mesophyll, xylem and phloem. Which level of organisation is a leaf?
A cell, because it is a basic building block of the plant
A tissue, because it is made of many similar plant cells
An organism, because it is able to make its own glucose
An organ, because it is made of several different tissues
19 exam-style questions on AQA GCSE Biology 2.1 Principles of organisation, covering 2.1 Principles of organisation. Each one has a worked solution and a mark scheme showing where the marks go.