Problem 1

In the geological period, the K-Pg extinction is marked by a thin sedimentary layer known as the K-Pg boundary. This line can be seen in both terrestrial and marine environment rocks. The boundary included an abundance of the metal iridium, which is a characteristic of asteroids, not the earth's surface. As a result, asteroids are thought to be the cause of the 66 million-year-old global extinction. There are evidences that showed the mass extinctions of the plant community as well. The pollen and leaves provided enormous evidence of its extinction. After the destruction of plants, many fungi started to proliferate as there was a huge amount of organic matter from the dead plants and animals. The fungi being saprophytic in nature feed on them and thrive for several years. The atmosphere after recovery got dominated by photosynthetic organisms like ferns due to which it showed a fern spike in the geological time scale.