Selective selection,since being smaller is an advantage the rabbits got smaller similar to evolution
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
The root word of Unicellular already tells you the answer. Uni means only one cell. So the answer is one cell.
An animal can respond in negative ways such as: biting, scratching, urinating, whining, restlessness, snippy, or getting sick.