The chordates possess a cranium or skull in which brain is present are included in
a) Protochordata
b) Acrania
c) Craniata
d) both a and b
Explanation: they are included in sub phylum vertebrata
Sub phylum vertebrata is divided to ………groups or super classes.
a) two
b) three
c) four
d) five
Explanation: 1. Pisces, 2. Amphibia,
3, reptilian, 4. Aves and 5. Mammalia
Which of the following class is the largest class of vertebrates?
a) pisces
b) amphibia
c) reptilia
d) aves
Explanation: fishes are included in this class constitutes about 48% vertebrates
The number of living fishes are more than…….
a) 3000
b) 10000
c) 29000
d) 80000
The animals belong to class pisces of sub phylum vertebrata respire through……
a) gills
b) book lungs
c) lungs
d) both a and b
Super class pisces is sub divided into….. classes.
a) two
b) three
c) four
d) five
Explanation: 1. Cyclostromata or Agnatha, 2. Chondrichthyes (cartilagisous fishes) and 3. Osteichthyes (bony fishes)
