Question

The Vertebrata is also known as
a. Acraniata
b. Craniata
c. Urochordata
d. Both B and C

Answer 1

Vertebrates are described as the most advanced organisms on the earth. They possess spinal cords, vertebrae, and notochords. They contain a series of nerves on the dorsal side. The vertebrates are larger animals as compared to invertebrates. They need more space. They also possess bone or segments of cartilage that form the spinal column.

Complete answer:
Vertebrates are known as advanced chordates and are also called urochordates. They have cranium or brain boxes around their brain. Therefore, they are also known as craniate. They belong to the phylum Chordata and subphylum Vertebrata.
The vertebrates are known as craniates because of the presence of the skull or cranium. Some of the craniates are fishes, amphibians, reptiles, birds, and mammals.
The bony or cartilaginous vertebrae replace the notochord and act as primary support for the body.

Hence, the correct answer is option (D).

Additional information:
Vertebrates include a diversity of chordates. The backbone or vertebral column protects the nerve cord. The skeleton provides strength and rigidity to the body. The ribs present in the chest cavity protects the internal organs. The brain is enclosed in a cartilaginous or bony case.

Note: The animal kingdom is divided into two categories, these are vertebrates and invertebrates. Invertebrates are also known as non-chordates, whereas the vertebrates are known as chordates. The main difference between these two categories is that the invertebrates do not possess a vertebral column or backbone, while vertebrates have a vertebral column or backbone.