Direction: Read the following passages carefully and answer the question that follows.
An ear of corn on a corn plant is protected by a husk and at the end of the ear, emerging from the husk, you can see a bunch of silk-like threads. What is the purpose of these threads ? Well, each thread is attached to a kernel of corn inside the husk and each kernel of corn, if it is fertilized by pollen, can become a seed that can grow into a new corn plant. How does pollen reach the kernel ? It travels through the silk-like thread, which is a hollow tube.