Considering lampreys and hagfish:

I.	Both groups have jawless mouths with horny epidermal structures that function as teeth.
II.	Both groups have branchial arches that are internally positioned instead of external as in jawed fishes.

 

1.	Only I is correct
2.	Only II is correct
3.	Both I and II are correct
4.	Both I and II are incorrect

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

Identify the incorrect comparison between a typical cartilaginous and a bony fish:

Match the types of reptilian skulls [COLUMN I] with their corresponding diagrams in COLUMN II and select the correct answer from the codes given:

	COLUMN I		COLUMN II
A	Anapsid	P
B	Synapsid	Q
C	Diapsid	R

Codes

The diagram shows the movement of air during inhalation in birds. The maximum percentage of the inhaled air will enter into:

1. Anterior air sacs
2. Lungs
3. Posterior air sacs
4. Parabronchi

Identify the incorrect comparison between a typical cartilaginous and a bony fish:

Which of the following is not seen in a marsupial?
1. Mammary glands
2. Three middle ear bones
3. True hairs
4. Corpus callosum