You are hiking in a forest and come upon a mysterious plant, which you determine is either a lycophyte sporophyte or a pterophyte sporophyte. Which of the following would be most helpful in determining the correct classification of the plant?

A) whether or not it has true leaves
B) whether it has microphylls or megaphylls
C) whether or not it has seeds
D) its height
E) whether or not it has chlorophyll a

B. Whether it has a microphylls or a megaphylls.

Explanation:

The above listed factors can be used to the determine the type of plant been found.

Microphylls are mainly leaves having a single, unbranched vein, while megaphylls are leaves with multiple veins. Also, in microphylls, the single vein originates from the protostele without having a leaf gap while megaphylls contain leaf gaps. Moreover, microphylls are the leaves, which occur early in the fossil record up to date while megaphylls develop independently from euphyllophyte leaf precursor structures.

Microphylls and megaphylls are two types of structures that occur in leaves of vascular plants.