Plants reacting to light is called phototropism. As plants need light to survive, by growing towards the direction of the light they give themselves the best chance of gettingâ¦ the most light.   Plants can tell the direction of the light because their surface has chemicals that react to light.
By On 11/29/15 at 12:30 PM. Refugees undergo the strictest background checks of any group of people entering the U.S. While some lawmakers have criticized the process for not being strict enough, it can sometimes take longer than two years, and Syrians go through an additional screening. Above, 5-year-old Syrian refugee Leen works on her homework at her new home in Sacramento, California, on November 16.
Refugee Travel Document. When a person seeks asylum from their home country, they are often unable to obtain a passport, and passports cannot be issued to non-citizens. For people seeking asylum, refugee travel documents work as a type of passport that will allow international travel.t is issued to citizens of a country and allows for international travel. In the US, ordinary passports are usually valid for 10 years if the passport holder is 16 or older, and five years if the passport holder is 15 or younger.