Question

which describes the geological time of the first land plants?
mosses appeared after the first flowering plants.
aquatic flora appeared many years ago.
the first flowering plants appeared around 240 million years ago.
the first flowering plants were introduced toward the end of the mesozoic era.

Explanation:

Mosses are non - flowering plants and appeared before the first flowering plants. Aquatic flora appearance time is too general to answer the question about first land plants. The first flowering plants did appear around 240 million years ago and toward the end of the Mesozoic era, which gives a more specific geological time - frame relevant to plant evolution.

Answer:

The first flowering plants appeared around 240 million years ago.
The first flowering plants were introduced toward the end of the Mesozoic era.