Causes Antibiotic resistance can also be introduced artificially into a microorganism through transformation protocols. This can be a useful way of implanting artificial genes into the microorganism. Antibiotic resistance is a consequence of evolution via natural selection.
How long do LEDs last? LEDs are notable for being extremely long-lasting products. Many LEDs have a rated life of up to 50,000 hours. This is approximately 50 times longer than a typical incandescent, 20-25 times longer than a typical halogen, and 8-10 times longer than a typical CFL. Used 12 hours a day, a 50,000 bulb will last more than 11 years. Used 8 hours a day, it will last 17 years!
How to Build an LED flasher circuit. In this project, we will show how to build a simple LED flasher circuit using a 555 timer chip. An LED flasher circuit is a circuit which flashes the LED-meaning turns it ON-OFF, ON-OFF, ON-OFF.e can slightly modify the circuit above so that it flashes 2 LEDs. The LEDs will flash alternatively. As one flashes on, the other flashes off. This happens pretty quickly but it still can be seen with the human eye. Additional Parts. 1  1Kâ¦ Resistor. 2  Red LED.