Question:

In the taxonomic categories which hierarchical arrangement in ascending order is correct in the case of animals?

Updated On: May 2, 2025

Kingdom, Phylum, Class, Order, Family, Genus, Species
Kingdom, Class, Phylum, Family, Order, Genus, Species
Kingdom, Order, Class, Phylum, Family, Genus, Species
Kingdom, Order, Phylum, Class, Family, Genus, Species

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The Correct Option is A

Solution and Explanation

The taxonomic hierarchy is a system used by biologists to organize all species of organisms. It is arranged in a linear fashion from broad to specific, encompassing seven major levels. The correct order for the hierarchical arrangement of animals is as follows:

Kingdom: This is the highest and most inclusive level in the hierarchy.
Phylum: This is more specific than Kingdom and groups organisms that are broadly related.
Class: This rank narrower than a phylum.
Order: Further narrows down organisms based on even more specific similarities.
Family: Groups organisms that are closely related within an order.
Genus: Consists of species that are closely related.
Species: The most specific level; it includes individuals that can breed and produce fertile offspring.

The correct hierarchical arrangement in ascending order for animals is: Kingdom, Phylum, Class, Order, Family, Genus, Species.

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Concepts Used:

Anatomy of Dicotyledonous and Monocotyledonous Plants

Dicot Root:

Dicot plants have the taproot system.
The outermost layer is called the epidermis. The epidermal cells sometimes project out which appear as the root hairs.
The epidermis is followed by the multi-layered cortex, loosely made of the parenchyma cells with intercellular spaces.
The inner layer of the cortex is called endodermis, which is tightly packed by the barrel shaped-cells.
Endodermis is followed by pericycle, which are a few layers of thick-walled parenchyma cells.
In dicots, the central pith is not distinct.
There are two to four xylem and phloem.
The xylem and phloem are remarked by a layer of parenchymatous cells known as conjunctive tissue.

Monocot Root:

Monocot roots do not show much difference in the anatomy from that of the dicot roots.

Monocot plants possess an adventitious root system.
As in the dicots, the epidermis forms the outermost layer, followed by cortex, pericycle, endodermis, vascular bundles (xylem and phloem) and pith (random order).
Pith is conspicuous and large.
The number of xylem in a monocot is six or more.
Secondary growth is not seen in the monocot plants.