1. 1 to 6 weeks
2. 7 to 10 weeks
3. 10 to 15 weeks
4. 15 to 20 weeks
7 to 10 weeks
1. Thyroid gland
2. Bone marrow
3. Preen gland
4. Bursa fabricii
Bursa fabricii
1. Hay fever
2. Erythroblastosis
3. Accute glomerular nephritis
4. Encephalitis
Accute glomerular nephritis
1. Order
2. Sub-species
3. Species
4. Genus
Sub-species
1. Ceratium
2. Gonyaulax
3. Giqrdia
4. Arcella
Gonyaulax
1. Mammalia
2. Reptilia
3. Arthropoda
4. Mollusca
Mollusca
1. Lack of jointed legs
2. Legs with claws
3. Presence of tracheal tubes
4. Presence of tubular heart
Lack of jointed legs
1. Leucosolenia
2. Sycon
3. Hyalonema
4. Grantia
Hyalonema
1. Heparin
2. Gastrin
3. Histamine
4. Fibrin
Histamine
1. Acetylcholine
2. Dopamine
3. Glycine
4. Oxytocin
Acetylcholine