Question

Arrangement of the following hierarchical level as per Lineal system will be :
A. Domains
B. Family
C. Phyla
D. Orders
E. Classes
Choose the correct answer from the options given below :

• A. A < B < C < D < E
• B. C < B < A < D < E
• C. B < D < E < C < A
• D. E < D < B < A < C

Hint:

A classic mnemonic to remember the biological hierarchy from largest to smallest is: Dear King Philip Came Over For Good Soup (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species).

Answer 1

The Correct Option is C

Step 1: Concept:
The question requires ordering the standard biological taxonomic ranks (based on the Linnaean hierarchical system plus the modern Domain).

Step 2: Step-by-step Explanation:

• The standard taxonomic hierarchy from most specific (lowest rank, smallest group) to most broad (highest rank, largest group) is:
Species $\rightarrow$ Genus $\rightarrow$ Family $\rightarrow$ Order $\rightarrow$ Class $\rightarrow$ Phylum $\rightarrow$ Kingdom $\rightarrow$ Domain.

• The options use the "less than" ($<$) symbol. In the context of a hierarchy, this usually represents moving from the smallest, most exclusive structural subset up to the largest, most inclusive overarching category.

• Using the list provided, let's arrange them from smallest category to largest:
1. Family (B)
2. Orders (D)
3. Classes (E)
4. Phyla (C)
5. Domains (A)

• Therefore, the correct mathematical sequence using the $<$ operator is:
Family $<$ Orders $<$ Classes $<$ Phyla $<$ Domains.

• Substituting the letters: B $<$ D $<$ E $<$ C $<$ A.

Step 3: Final Answer:
The correct sequential arrangement is B $<$ D $<$ E $<$ C $<$ A, which matches option (C).