Match the organism in Column-I with its excretory structure in Column-II

1. (A)$\to$(s),(B)$\to$(p),(C)$\to$(q),(D)$\to$(r)

2. (A)$\to$(s),(B)$\to$(p),(C)$\to$(r),(D)$\to$(q)

3. (A)$\to$(q),(B)$\to$(p),(C)$\to$(r), (D)$\to$(s)

4. (A)$\to$(s), (B)$\to$(q),(C)$\to$(r),(D)$\to$(p)

Which one of the following features are not true for chordates?
(a) Heart is dorsal.
(b) Pharynx is perforated by gill slits.
(c) Central nervous system is ventral, solid and single.
(d) Post-anal tail is present.
(e) Notochord is present.  
Choose the most appropriate answer from the option give below:

Which of the following characteristic features always holds true for the corresponding group of animals?

Which of the following represent the correct combination without any exception?

Which of the following statement/s about chondrichthyes are incorrect?

1) Notochord is persistent throughout life

2) Endoskeleton is made up of bones

3) Operculum present

4) Skin is covered by placoid scales

(1) All of the above

(2) None of the above

(3) 1 and 4 are incorrect

(4) 2 and 3 are incorrect

All cyclostomes are ___________ on some fishes; paired fins are _________, cranium is ________ and circulation is _______ type.

1. Ectoparasites, Absent, Cartilaginous, Open

2. Endoparasites, Present, Bony, Closed

3. Ectoparasites, Absent, Cartilaginous, Closed

4. Ectoparasites, Present, Cartilaginous, Open

Read the following statements :

A. Mouth is located ventrally.
B. Notochord is persistent throughout life.
C. Gill slits are seperate and with operculum.
D. Air bladder are absent.

How many of the above statements are correct for given
figure :

1. Four.
2. Three.
3. Two.
4. One

Consider the following characters:

I. Air bladder

II. Operculum

III. Viviparity

The characters present in bony fishes include:

Operculum and an air bladder are present in :

1. Clarias

2. Pristis

3. Trygon

4. Carcohrodon

Match each item in Column I with one item in Column II and chose your answer from the codes given below.

Codes:

                I            II            III            IV

1.             1            2             3               4

2.             2            1             4               3

3.             2            1             3               4

4.             1            2             4               3