Identify the incorrect statement regarding echinoderms:

1.	Echinoderms evolved from animals with bilateral symmetry.
2.	Echinoderms have a mesodermal skeleton composed of calcareous plates or ossicles.
3.	Most echinoderms are not able to reproduce asexually and regenerate tissues, organs, and limbs.
4.	Echinoderms are also the largest phylum that has no freshwater or terrestrial (land-based) representatives.

The bone structure in the following diagram shows:

Common characteristic of fishes do not include:

The second largest group of dueterostomes are:

The closest relative of the vertebrates are:
1. Echinoderms
2. Lancelets
3. Tunicates
4. Hemichordates

Considering lampreys and hagfish:

The tunic of urochordates is composed of proteins and complex carbohydrates, and includes tunicin, which is a variety of:

Which of the following scaled in a fish are called as placoid?

1.
2.
3.
4.

This type of egg cannot belong to a/an:

Totipotent cells present in the mesohyl of porifers are known as:
1. Lophocytes
2. Amoebocytes
3. Collencytes
4. Grey cells