Some desert plants respond to darkness by opening their flowers at night to lure in pollinators. In this situation, a plant's response system is working in conjunction with the —
immune system.
vascular system.
reproductive system.
root system.

B

Explanation:

answer; the above answer to the above statement is (true)

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.