Question

Small changes within the species is known as _____.

• A. Macro evolution
• B. Micro evolution
• C. Dominance
• D. Speciation

Hint:

Evolution types:
• Microevolution \( \rightarrow \) Small changes within species
• Macroevolution \( \rightarrow \) Large evolutionary changes

Answer 1

The Correct Option is B

Concept:
Evolution refers to gradual changes occurring in living organisms over generations. Small evolutionary changes occurring within a species are called: \[ \boxed{\text{Micro evolution}} \] These changes may involve:
• Gene frequency changes
• Minor adaptations
• Small variations

Step 1: Understand microevolution.
Microevolution occurs within populations and species over relatively short periods. Examples:
• Antibiotic resistance in bacteria
• Variation in insect color

Step 2: Differentiate macroevolution and speciation.
Macroevolution:
• Large-scale evolutionary changes
• Formation of major groups Speciation:
• Formation of new species The question specifically asks about: \[ \text{small changes within species} \] Hence the answer is microevolution.

Step 3: Analyze all options carefully.
Option (A): Macro evolution
Large-scale changes. Incorrect. Option (B): Micro evolution
Small changes within species. Correct. Option (C): Dominance
Genetic expression concept. Incorrect. Option (D): Speciation
Formation of new species. Incorrect.

Step 4: Choose the correct answer.
Therefore, small changes within species are called: \[ \boxed{\text{Micro evolution}} \] Hence, \[ \boxed{(2)\ \text{Micro evolution}} \]