Matching Body Feature and Animal Possessing It

Body features are specific characteristics that distinguish one animal from another. Here, we are identifying the correct matching pair of body features and the animal possessing it.

Ventral Central Nervous System - Leech

- The ventral central nervous system is a characteristic feature of the leech.
- The leech belongs to the phylum Annelida, which is characterized by segmented bodies.
- The nervous system of the leech is ventral, which means that it is located on the underside of the body.
- The ventral nerve cord of the leech runs the length of the body and is composed of ganglia (clusters of nerve cells) connected by nerves.
- The ventral central nervous system of the leech is responsible for coordinating movement and other bodily functions.

Pharyngeal Gill Slits Absent in Embryo - Chameleon

- The chameleon belongs to the class Reptilia, which is characterized by the absence of pharyngeal gill slits in the embryo.
- Pharyngeal gill slits are a characteristic feature of chordates, which includes vertebrates.
- In the embryo of chordates, pharyngeal gill slits develop into structures such as gills, jaws, and ears.
- However, in reptiles such as chameleons, these structures do not develop from pharyngeal gill slits.

Ventral Heart - Scorpion

- The ventral heart is a characteristic feature of the scorpion.
- The scorpion belongs to the class Arachnida, which is characterized by the presence of a ventral heart.
- The ventral heart of the scorpion is located on the underside of the body, between the cephalothorax and the abdomen.
- The ventral heart of the scorpion is made up of a series of muscular chambers that pump blood throughout the body.

Post-Anal Tail - Octopus

- The post-anal tail is a characteristic feature of some animals, such as fish and amphibians, but not of octopuses.
- Octopuses belong to the class Cephalopoda, which is characterized by the absence of a post-anal tail.
- Octopuses are marine animals with eight arms and no tail.
- The lack of a post-anal tail in octopuses is related to their mode of movement, which involves jet propulsion through water using a muscular mantle cavity.

Therefore, the correct matching pair of body feature and animal possessing it is:

a) Ventral central nervous system - Leech.