Fig. 3.1 shows a light micrograph of root-tip cells from the garlic plant Allium sativum. The diploid number $(2n)$ is $16$.
(a)[1]
Identify the stage of mitosis visible in cell D.
(b)[2]
Explain why mitosis takes place in a plant such as Allium sativum.
(c(i))[1]
State the haploid number for Allium sativum.
(c(ii))[3]
Explain why a plant such as Allium sativum produces haploid cells.
(d)[5]
DNA replication must happen before cell division. Describe the process of DNA replication.
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