Key Concepts: 1  Legumes (family Fabales) develop root nodules that harbour Rhizobium bacteria (rhizobia). 2  Endosymbiotic bacteria (bacteroids) convert nitrogen to ammonia (biological nitrogen fixation). 3  Legume crops restore fertility to agricultural soils by capturing nitrogen from the atmosphere.
6.Gold gives extra sheen to the body: A person wearing a moderate amount of gold in the form of simple jewelry looks gorgeous. The color and soft shine of the gold is enticing. Gold has the malleability that helps to make beautiful jewelry, wearing of which gives a stunning appearance to the person wearing it. 7. Lowers arthritis symptoms:
COMMON GOLD ALLOYS. 24K gold (100% pure gold) does not work well for jewelry because it is too soft. A more durable option is 18K gold, which is 75% pure gold. It has the richness of 24K gold where some of the less pure alloys may not.old is popular because it can be worked into almost any shape. Yellow gold jewelry of 18K and above does not tarnish and rarely causes problems for people with skin irritations. White Gold is popular for its appearance and price point compared to platinum alloys.