Which one has a real existence
(a) Phylum
(b) Class
(c) Genus
(d) Species

Options

A. Phylum
B. Class
C. Genus
D. Species

Answer

To determine which of the given options has a real existence, we need to analyze each taxonomic category mentioned in the question:

1. **Phylum**: This is a high-level taxonomic category that groups together organisms based on certain shared characteristics. However, it is an abstract classification and does not represent a specific, tangible group of organisms.

2. **Class**: Similar to phylum, class is another taxonomic category that further divides organisms within a phylum. Classes are also theoretical constructs used for classification purposes and do not have a real existence.

3. **Genus**: A genus is a rank in the biological classification that groups species that are closely related. While it is more specific than phylum and class, it still serves as a classification tool and does not represent a real, distinct entity.

4. **Species**: This is the most specific taxonomic category and refers to a group of organisms that can interbreed and produce fertile offspring. Species have a real existence because they represent actual populations of organisms in nature.

Based on this analysis, the correct answer is:

**(d) Species** - Species have a real existence as they represent groups of interbreeding populations.