Answer: CO alarms have a life expectancy of around seven years. The CO alarm will beep every 30 seconds or display ERR or END. If a CO alarm is at its end-of-life, replacing the battery will not stop the beep. Most detectors will beep 4 or 5 times in a row about every 4 seconds. Do not mistake dangerous levels of poisonous gas for a detector with low battery.
Explanation: (credits to the internet) Hope this helped! :D
Answer:
Cyanobacteria are responsible for first adding oxygen to the Earth's atmosphere.
Zea diploperennis<span> is a wild relative of maize that is endemic to the Sierra de Manantlán Biosphere Reserve in Mexico. Because this species is a priority for conservation in the reserve, the effects on its populations of the most common types of anthropogenic disturbance – slash-and-burn, and slash without subsequent burning – were investigated in three populations for 5 years</span>
<span>Regions of DNA that read the same regardless of the direction are called Palindromes. The sequence of nucleotides is the same whether you start from the 3' end or the 5' end. Palindromes may occur due to chromosomal inversion or due to breakage.</span>
