Which of the follwing organ systems in birds soften the protective layer of the seeds and make it easier to germinate?
A
Respiratory system
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B
Excretory system
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C
Digestive system
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D
Reproductive system
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Solution
The correct option is C Digestive system Animals and birds play an important role in spreading seeds of various plants.
The digestive enzymes in the digestive system of the birds soften the protective layer of the seeds and make it easier to germinate.