Q. 4 - Biology

Question

The first form of life on Earth were ________

a. plants

b. microorganisms

c. birds

d. dinosaurs

Step-by-Step Solution

Answer

As the result, the correct option is $b$.

Step 1: Explanation Incorrect answer (a), (c) and (d)

As a result, choices a, c and d are erroneous.

Microorganisms are thought to be the initial forms of life on Earth, based on numerous evidences. This is due to the fact that they have existed for billions of years before other animal or plant living organisms formed. Microorganisms are a broad category of organisms that includes archaea, bacteria, protozoa, algae, and fungi, among others.

Step 2: Explanation Correct answer (b)

The planet Earth is home to a diverse range of life forms. Plants, birds, and animals such as dinosaurs were only around $130$ to $200$ million years old when they first appeared. As a result, these living forms are relatively new.