1. Xylem
2. Phloem
3. Parenchyma
4. Cambium
Xylem
1. Oxygen
2. Nitrogen
3. Carbon
4. Cambium
Carbon
1. 18 th segment
2. 10 th segment
3. 13 th segment
4. 14 th segment.
13 th segment
1. Rocks
2. Clay
3. Carbon
4. Organisms
Rocks
1. 9 th and 10 th
2. 8 th and 9 th
3. 11 th and 10 th
4. 12 th and 10 th.
11 th and 10 th
1. 14 th
2. 11th
3. 18th
4. 17 th
14 th
1. Required in very minute quantity
2. Radioactive
3. Those which draw other elements
4. First discovered in protoplasm
Required in very minute quantity
1. Development of ovum
2. Development of sperms
3. Storing of spermatozoa
4. Storing ova
Storing of spermatozoa
1. Zinc
2. Cobalt
3. Nitrogen
4. Potassium
Nitrogen
1. Oviduct
2. Spermatheca
3. Clitellum
4. Cocoon.
Cocoon.