What is triple fusion ?

Explanation

(i) Thyroid hormones is essential for normal physical, mental and personality development. Hence it is called as personality hormone.
(ii) The fusion involving two polar nucleus and a sperm nucleus, that occurs in double fertilization in a seed plant and results in the formation of endosperm, is called the triple fusion.
(iii) Importance of forests.
• Forests are the important component of our environment and are dominated by microorganisms, flowering plants, shrubs, climbers and dense trees.
• Forests provide a vast habitat for wild animals.
• Forests help for the economic development of our country.
• Forests are the source for a wide range of renewable natural resource,
• Forests provide wood, food, fodder, fibre and medicine.
• They act as carbon sink, regulate climatic conditions, increase rainfall and reduce global warming.• Forests protect wild life and also acts as catchment for water conservation.
• They prevent natural hazards like floods and landslides
• They play a vital role in maintaining the ecological balance.