Limbs are present in

(1) Osteichthyes

(2) Chondrichthyes

(3) Reptiles

(4) urochordates

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

Which of the following animal has a bony endoskeleton?

(1) Exocoetus

(2) Clarias

(3) Pristis

(4) both (1) and (2)

In which of these examples are the members exclusively chondrichthyes

(1) Scoliodon, Pristis, Labeo, Betta

(2) Scoliodon, Pristis, Betta, Trygon

(3) Scoliodon, Trygon, Pristis, Carcharodon

(4) Scoliodon, labeo, Carcharodon, Pristis

Dry, cornified skin along with epidermal scales or scutes is found in

(1) Tortoise

(2) Hyla

(3) Bufo

(4) All of the above

The common name of Calotes versicolor is

1. Garden lizard

2. Tree lizard

3. Wall lizard

4. Monitor lizard

In some Bilateria, the body is of many segments that show serial repetition of parts. Such segments are called as:

1. Myotomes

2. Metameres

3. Proglottides

4. Comb plates

The phylum with exclusively marine animals is:

1. Porifera

2. Cnidaria

3. Ctenophora

4. Platyhelminthes

Notochord is derived from embryonic:
1. Ectoderm

2. Mesoderm

3. Endoderm

4.Ectoderm and Mesoderm

Identify the phylum where the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches between ectoderm and endoderm?