(a)[1]
State, giving a reason, whether Fig. 1.1 is a section through the root or the stem of H. annuus.
(b)[2]
Cell type A in Fig. 1.1 has a large central vacuole. Suggest, with reasons, the role of the tissue made from this cell type.
(c(i))[1]
Structure B in Fig. 1.1 contains phloem tissue and xylem tissue plus other tissues that give support. Name structure B.
(c(ii))[1]
Structure B has an actual length of $650\,\mu\text{m}$. State this length in $\text{mm}$.
(d)[3]
When structure B is seen at a higher magnification, more detail of xylem vessel elements and phloem sieve tube elements can be observed. Outline the differences in the structure of a xylem vessel element and a phloem sieve tube element.