Question

What is the meaning of biological evolution?

Hint:

Think of evolution as: “{Change + Time = New Species}”.

Answer 1

Step 1: Definition
Biological evolution refers to the gradual change in living organisms over generations, leading to the formation of new species. It is driven by genetic variations, natural selection, and adaptation to the environment.
Step 2: Key Points
Proposed by Charles Darwin in his book “Origin of Species.”
Explains how simple life forms gradually developed into more complex organisms.
Involves mechanisms like mutation, variation, natural selection, survival of the fittest.
Step 3: Examples
Evolution of giraffes – from short neck ancestors to long-necked giraffes due to selection pressure.
Evolution of humans – from ape-like ancestors to modern Homo sapiens.
Development of antibiotic resistance in bacteria.
Final Answer:
Biological evolution means the slow and continuous change in organisms over generations, leading to the origin of new species.