1. In all the segments
2. From 15 th to the last segment
3. In the first 15 segments
4. From 10 th to last segment.
From 15 th to the last segment
1. Septal nephridia
2. Integumentary nephridia
3. Pharyngeal nephridia
4. All the above
Septal nephridia
1. Glycogen synthesis
2. Synthesis of urea
3. Removal of silicates
4. Elimination of surplus Ca++ ions.
Synthesis of urea
1. None
2. One
3. Two
4. Many
None
1. through alimentary canal
2. through cloacal aperture
3. directly outside
4. through circulatory system
through alimentary canal
1. Ferrous form
2. Ferric form
3. Combined form
4. All the above
Ferrous form
1. Not important for plant growth
2. Required in large quantity
3. Required in small quantity and are important as macro – nutrients
4. Not present in the soil
Required in small quantity and are important as macro – nutrients
1. Hydrogen
2. Potassium
3. Sodium
4. Zinc
Potassium
1. Nitrogen
2. Iron
3. Boron
4. Carbon
Carbon
1. Calcium
2. Sodium
3. Zinc
4. Magnesium
Magnesium