Afarmer has two types of cattle on his farm. one type grows very large, but takes a long time to grow. the other type grows quickly, but does not grow large. the farmer wants large cows that grow quickly. what process could he use to achieve those desired traits?

If the farmer were to breed both of the two different types of cattle he would have a hybrid type of new cattle with both traits  :)

The nervous system transmits pain, while the endocrine system elicits the fight or flight response. 

in conditions of stress, neurons in sensory regions sense stress and transmit the stress signals to hypothalamus in the brain. cells of hypothalamus then transmit signals to pituitary gland, inducing the cells of pituitary gland to secrete hormones into blood stream. these hormones, which form a part of endocrine system, then elicit the flight or fight response, causing the boxer to fight accordingly.