ICSE Class 10 Answered

• Montreal Protocol:

The Montreal Protocol is an agreement which was signed on 16^th September 1987 at Montreal (Canada) by 27 countries and became effective in 1989. It is an international treaty to limit the production and use of ozone-depleting substances like chlorofluorocarbons (CFCs) and to implement the use of alternatives to CFCs.

• Producers, Consumers, Decomposers, Energy flow

Odd term: Energy flow. Rest constitute the various trophic levels in the food chain.

• Two forms of auxins which are extracted from the plants-

• Differences between root cap and root hair based on kinds of cells: