A. Cartilaginous fishes
B. Bony fishes
C. Running fishes
D. Jawless fishes
0
They are considered to be the most primitive and are surely the first of the vertebrates?
0
Sub- phylum vertebrate is also known as__________?
A. Frogs
B. Reptiles
C. Amphibinas
D. Jawless fishes
0
The phylum chrordata comprise about how many species?
A. Pisces
B. Craniata
C. Aves
D. Amphibia
0
It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates
A. 25,000
B. 50,000
C. 100,000
D. 10,00,000
0
Snails belong to__________?
A. Placenta
B. Notochord
C. Cranianta
D. Ligule
0
In mouth cavity of many molluscs there is a rasping tongue like structure_________provided with many horny teeth.
A. Cephalopodsxc
B. Gastropods
C. Bivalves
D. Athropods
0
All insects have how many parts of legs?
A. Ligule
B. Radula
C. Mantle
D. Muscle
0
In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?
A. 4
B. 2
C. 3
D. 6
0
In many which phylum the body of an organisms is usually divided in there regions called head, thorax and abdomen?
A. Endodermis
B. Mesophyll
C. Chitin
D. Epidermis
Download App