Question

5) Place the following events on a rough timeline of the history of life on Earth (using the geological time line on the next page): radiation of the mammals, origin of flight in the insects, earliest fossils, formation of the oxygen rich atmosphere. origin of the Eukaryotes, invasion of land by tetrapods. invasion of land by plants, the largest mass extinction in the history of life on Earth

Answer 1

ANSWER :

Placing the geological events to the respective timeline history of life on the Earth :

1. Radiation of mammals --- end of Cretaceous period

2. Origin of flight in insects --- Carboniferous period

3. Earliest fossils --- Precambrian period

4. Formation of the oxygen rich atmosphere --- Proterozoic eon

5. Origin of eukaryotes --- Proterozoic eon

6. Invasion of land via tetrapods --- Palaeozoic era (Cambrian period)

7. Invasion of land via plants --- Silurian period

8. Largest mass extinction in the history of life on the Earth --- Mesozoic era (Cretaceous period).