1. facial nerve
2. vagus nerve
3. trigeminal nerve
4. auditory nerve
vagus nerve
1. Herbert Spencer
2. Hugode Vries
3. Alfred Russel Wallace
4. Muller
Alfred Russel Wallace
1. spontaneous mutations
2. chemical mutations
3. induced mutations
4. chromosomal mutations
chemical mutations
1. calcium
2. iron
3. magnesium
4. sodium
calcium
1. liver of shark
2. airbladder of fish
3. scales of fish
4. skin of cod fish
scales of fish
1. monocytes
2. leucocytes
3. lymphocytes
4. erythrocytes
lymphocytes
1. air pollution
2. water pollution
3. land pollution
4. all of these
air pollution
1. Hemichordata
2. Urochordata
3. Cephalochordata
4. Craniata
Cephalochordata
1. oxygenated blood to brain
2. oxygenated blood to limbs
3. impure blood to liver
4. impure blood to kidney
oxygenated blood to brain
1. sternum
2. scapula
3. coracoid
4. clavicle
clavicle