Question

Observe the given animal and answer the following questions: 

1. Identify the given animal and its phylum.
2. Write any two characteristics of that phylum.

Answer 1

1. The given animal is Balanoglossus. It belongs to Phylum Hemichordata.
2. Characteristics of the Phylum-Hemichordata:
   1. The body of these animals is divided into three parts as proboscis, collar, and trunk.
   2. The notochord is present only in the proboscis region. Hence, they are called hemichordates.
   3. These animals are also called ‘acorn worms.’
   4. These are marine animals that live in burrows in sand.
   5. They have one to many pharyngeal gill slits.
   6. They are unisexual, or some may be hermaphrodite.