1491. The Phylum chordate derived its name from one of the following common characteristics:

A. Hollow dorsal nervous system
B. Notochord *
C. Paired gill slits
D. All of them

1492. Which of the followings is considered basic characteristics of chordates ?

A. Hollow dorsal nervous system
B. Notochord
C. Paired gill stilts
D. All of them *

1493. Higher chordates are characterized by :

A. Replacement of notochord by verbal column
B. Presence of a bony brain case
C. Presence of hairs and mammary glands
D. Both A and B *

1494. Strictly aquatic Vertebrates are placed in super- Class:

A. Pisces *
B. Tetrapod
C. Both A and B
D. None of them

1495. Of the following , Which one is not the characteristic of kingdom Animalia :

A. All animals are injective heterotrophs
B. All animals are eukaryotes
C. All animals develop from the dissimilar gametes i.e larger sperm and small egg *
D. It is largest

1496. The redial symmetry is found in the animals :

A. Protozoa
B. Porrifiera
C. Cnidarian *
D. All of these

1497. Of the following ,Which one is no -cellular in most cases in animals ?

A. Mesenchyme *
B. Sclerenchyma
C. Chlorenchyma
D. Mesoderm

1498. The excretory organs in fish is :

A. Gills
B. Kidney *
C. Swim Bladder
D. Gas vacuoles

1499. The heart possesses how many chambers in a fish :

A. one
B. Two *
C. Three
D. Four

1500. In one of the following the notochord and nerve cord is present only in free-swimming larvae:

A. Urochordata *
B. Cephalochordate
C. Vertebrata
D. Tetrapod