Researchers have discovered that children diagnosed with adhd have a decrease in size of the left prefrontal cortex of the brain when compared to children without adhd. based on these findings we can conclude that inattention, hyperactivity, and impulsivity are controlled by the prefrontal cortex

There are eight major terrestrial biomes: tropical rainforests, savannas, subtropical deserts, chaparral, temperate grasslands, temperate forests, boreal forests, and Arctic tundra. Biomes are large-scale environments that are distinguished by characteristic temperature ranges and amounts of precipitation.