The canopy in tropical forests is single layered, allowing light penetration throughout the forest floor.
true
false

False

Explanation:

The tropical forest have well developed capony  as the they receive enormous amount of rainfall which increases the productivity of the forest. Due to dense canopies, the reach of sunlight with in the tropical forest  is just 10% of the total sunlight falling on it.  

During the dry season, when the leaves fall from the trees, the canopy density reduces which allows adequate amount of sunlight to reach the ground.  

Hence, the given statement is false

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.