Naina B. answered 06/16/16
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Naina, a versatile tutor
Ny,
It is the biological mechanism that spiders use for foraging (capturing the prey for their food).
It is made of complex protein that spiders can synthesize.
Their physiology and cell biology triggers silk secretion and formation in response to signal such as: sensing a prey around, feeling hungry, chemical reception for an activity and so on.
It is an interesting research topic since spider silk is a complicated protein and has many biological applications.
Hope you find this insightful.