A. Ligule
B. Radula
C. Mantle
D. Muscle
Biology
Snails belong to……….?
A. Cephalopodsxc
B. Gastropods
C. Bivalves
D. Athropods
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. Placenta
B. Notochord
C. Cranianta
D. Ligule
The phylum chrordata comprise about how many species?
A. 25,000
B. 50,000
C. 100,000
D. 10,00,000
Sub- phylum vertebrate is also known as……….?
A. Pisces
B. Craniata
C. Aves
D. Amphibia
They are considered to be the most primitive and are surely the first of the vertebrates?
A. Frogs
B. Reptiles
C. Amphibinas
D. Jawless fishes
Scolidon or dog fish belong to the group of fishes called……….?
A. Cartilaginous fishes
B. Bony fishes
C. Running fishes
D. Jawless fishes
Nephrostome in earthworm opens in…………?
A. External space
B. Internal Body cavity
C. In gut
D. In Bladder
The nephridia of earthworm open into the coelom by………?
A. Nephrostome
B. Nephridiopore
C. Flame cell
D. Anus
Mammalian kidney, under restricted water supply can conserve water by over …….. % reabsorption of glomerular filtrate
A. 80.50%
B. 90.50%
C. 95.50%
D. 99.50%