100 points if someone explains how I write this dichotomous key. (3rd time asking, please answer)

Statement 1a: Needle leaves, Pine(Name)

Statement 1b: Non-needle leaves, 2(Number)

Statement 2a: smooth edge, Magnolia(Name)

Statement 2b: jagged edge, Holly(Name)

Ans.

The phloem is living plant tissue ,found in vascular plants and made up of parenchyma cells and sieve elements. Phloem performs translocation, which involves transport the soluble organic products of photosynthesis, mainly the sucrose from photosynthetic sites other plant parts where needed.

Thus, the primary function of the phloem in vascular plants is to perform 'translocation.'