There is something called the lock and key mechanism; it has a shape that fits the substrate like a lock fits a key only substrates with a particular molecular shape
Ice in the north pole have decresd in last few decaeds because of globle warming
Answer:
seasons are caused by revolutions. hope this helps
Summer's considered the best out of the 4 seasons because most people are on summer vacation and they are able to spend quality time with their family without all the snow or cold weather.
