You need to identify a plant, but it is winter, and the leaves have fallen to the ground mixed with others. The parts of flowers, fruits, and seed leaves of germinating seeds are not available either. Your best clue to whether it is a monocot, or a eudicot is to:.

Cut the stem and if the vascular bundles are scattered in the stem, it is a monocot.

Explanation:

The plant is whether monocot or dicot can be identified by the cross-section of the stem if leaves, flowers, fruits or seeds are not available.

In the cross-section of the monocot stem, the vascular bundles are scattered, without following a definite arrangement, whereas the dicot stem, will have the vascular bundles that have a definite shape, aligned in the form of rings.

In the case of monocot stem the bundle sheath is present whereas in case of dicot stem the bundle sheet is absent.

i'd say that the moon rock is about 2.2 billion years old.

allowed for the prediction of the properties of missing elements.