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Refer to the events given below and arra...

Refer to the events given below and arrange them in the CORRECT chorological order.
(A) Invertebrates formed and active
(B) First cellular forms of life
(C) Existence of seaweeds and few plants
(D) Appearance of reptiles on earth
(E) Appearance of shrew - like mammals.

A

`B rarr A rarr C rarr D rarr E`

B

`B rarr C rarr A rarr D rarr E`

C

`B rarr A rarr D rarr C rarr E`

D

`B rarr A rarr C rarr E rarr D`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question of arranging the events in the correct chronological order, we will analyze each event based on the timeline of life on Earth. 1. **First Cellular Forms of Life (B)**: The earliest life forms were simple cells, known as prokaryotes, which emerged around 3.5 to 4 billion years ago. This is the starting point of life on Earth. 2. **Invertebrates Formed and Active (A)**: After the first cellular life, invertebrates began to appear during the Cambrian period, approximately 544 million years ago. This marks the development of more complex life forms. 3. **Existence of Seaweeds and Few Plants (C)**: Following the appearance of invertebrates, algae (including seaweeds) emerged in the Ordovician period, around 505 million years ago. This represents the beginning of photosynthetic organisms that could produce oxygen. 4. **Appearance of Reptiles on Earth (D)**: Reptiles evolved later, during the Carboniferous period (around 300 million years ago) and became dominant during the Mesozoic era, particularly in the Jurassic period. 5. **Appearance of Shrew-like Mammals (E)**: Finally, shrew-like mammals appeared in the Cenozoic era, after the extinction of the dinosaurs, around 65 million years ago. Now, arranging these events in chronological order, we have: 1. **B**: First cellular forms of life 2. **A**: Invertebrates formed and active 3. **C**: Existence of seaweeds and few plants 4. **D**: Appearance of reptiles on earth 5. **E**: Appearance of shrew-like mammals Thus, the correct chronological order is **BACDE**.
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