Assertion: Genera are aggregate of closely related species.
Reason: Genus comprises a group of related species which has more character in common in comparison to species of other genera.

Options

A. If both assertion and Reason are true and the reason is a correct explanation of the assertion.
B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion and Reason are False.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "genera are aggregates of closely related species." This means that a genus is a group that contains species that are more similar to each other than to species in other genera.

2. **Understanding the Reason**: The reason provided is that "genus comprises a group of related species which has more characters in common in comparison to species of other genera." This indicates that within a genus, the species share more traits and characteristics than species from different genera.

3. **Taxonomical Hierarchy**: To further understand this, we can look at the taxonomical hierarchy, which is organized as follows: Kingdom > Phylum > Class > Order > Family > Genus > Species. As you move up this hierarchy, the organisms become less similar to each other.

4. **Example for Clarity**: For example, if we consider species A, B, and C grouped under genus X, and species D, E, and F under genus Y, we can see that species A, B, and C (within genus X) share more characteristics with each other than with species D, E, and F (from genus Y).

5. **Conclusion on Assertion and Reason**: Both the assertion and the reason are true. The assertion correctly identifies that genera are aggregates of closely related species, and the reason accurately explains why this is the case—because species within a genus share more characteristics compared to those in different genera.

6. **Final Answer**: Therefore, the correct option is that both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

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