Keith is an environmental scientist. He was studying the loss of ozone layer and its effect on different species. His data showed that in the beginning or twentieth century there were hardly any loss of ozone layer. He categorized that time period as time A. Further inquiry revealed that things didn't go well at the end of twentieth century - when there were severe loss of ozone layer. He categorized that time as time B. Which perion would more likely see ocean food webs disrupted, time A or time B?
Ans: time B

Pete liked the human physiology so he started reading about the digestive system, especially about the jejunum. His colleague Fox, studied more about the stomach. Which student read more about the second part of the small intestine?
Ans: Pete

Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town. Which hydrologist learned less about the causes of acid rain formation?
Ans: Dan

Two colleagues studied at the same university. Nick studied the brains of birds, while Joe studied the brains of mammals. Which colleague studied more about the mental abilities of an animal?
Ans: Joe