Question

Flowering plants are first seen in fossils formed during the:

Answer 1

Cretaceous period (aka the Mesozoic era)

Step-by-step explanation:

One way to find the earliest flowering plant would be to find the earliest fossil of one. So far this has been from around 125 million years ago, in the Cretaceous period. Once flowering plants start appearing in the fossil record, they diversify rapidly.

Hope this helps!!