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Scientists have found that pesticides [harm / harmful] the ability of bees to find food. Bees must learn which flowers [retain / contain] nectar (their food) from the [smell / smelling] of the flowers. If the bees do not learn which [scents / sense] mean food, they will [starve / scarf] . Researchers at the University of Dundee in Scotland and Newcastle University in England found that pesticides used [on / by] farmers and gardeners can switch [on / off] the part of a bee's brain that is responsible [to / for] associating smells with food. Lead researcher Dr Geraldine Wright said pesticides could seriously [compact / impact] the survival of honeybee colonies. She said, "bees that cannot learn will not be able to find food". This also means bees will not pollinate crops and [tame / wild] plants.

Bee [populations / popularity] around the world have been [declined / declining] . Scientists have searched for a long time for a reason why so many bees are [disappearance / disappearing] . This new research may be an important [clue / clueless] . However, the British government does not want to stop the [use / used] of the pesticides that may prevent bees from learning. It wants to carry [out / in] more tests to make sure pesticides are the [really / real] reason for the reduction in the number of bees. A spokeswoman from the Friends Of The Earth charity said the government must [act / action] sooner rather than later. "Bee health is [far / for] too urgent to wait until more research has been completed. Controls should be placed on these pesticides until bee [safety / safe] can be guaranteed," she said.