In 2004, the United States passed an amendment to the Fair Labour Standards Act of 1938. The amendment allows certain children aged 1418 to work in or outside a business where machinery is used to process wood. The law aims to respect the religious and cultural needs of the Amish community of the United States. The Amish believe that one effective way to educate children is on the job. The new law allows Amish children the ability to work with their families, once they are passed eighth grade in school.
What grade do Amish children need to pass in order to be able to work for their families?
eighth grade

This effectively means that populations of organisms must have reached a certain measurable level of difference to be recognised as subspecies. Dean Amadon proposed in 1949 that subspecies would be defined according to the seventy-five percent rule which means that 75% of a population must lie outside 99% of the range of other populations for a given defining morphological character or a set of characters. The seventy-five percent rule still has defenders but other scholars argue that it should be replaced with ninety or ninety-five percent rule.
Many scholars argue what should be replaced with a ninety or ninety-five percent rule?
The seventy-five percent rule

The act of predation can be broken down into a maximum of four stages: Detection of prey, attack, capture and finally consumption. The relationship between predator and prey is one that is typically beneficial to the predator, and detrimental to the prey species. Sometimes, however, predation has indirect benefits to the prey species, though the individuals preyed upon themselves do not benefit. This means that, at each applicable stage, predator and prey species are in an evolutionary arms race to maximize their respective abilities to obtain food or avoid being eaten. This interaction has resulted in a vast array of adaptations in both groups.
How does the prey improve their evolutionary abilities through predator-prey interaction?
array of adaptations