Two different rivers were stocked with adult fish. Red river had a lower fish population because the fish had hardly reproduced naturally. Black river had doubled it's fish population in two years because they reproduced naturally. Which of the two rivers had more fish release their gametes into the surrounding water ?
Ans: Black

Jordan and Alejandro are drivers currently in an intense car race. Some dust blows into Jordan's car, causing him to sneeze and take his foot off of the gas pedal. At the same time, Alejandro gets a burst of adrenaline and presses down very hard on the gas pedal in his car. Who will cause their car to increase in speed?
Ans: Alejandro

John wanted to see how he would fare in high altitude compared to ground-level. So, he first measured his responses in ground-level. He labeled this part of the study as case A. Then he board on an airplane to reach high altitude, and measured his responses there. He labeled this part of the study as case B. Now, John knows how he needs to prepare for a high altitude hiking. Which case would see more oxygen, case A or case B?
Ans: case A

In the beginning of year 1000 mount Etna had a huge volcanic eruption. To test the effect of volcanic eruption on sea level scientists measured geological data through carbon dating. They measured the data for four different time point - for year 998, year 1000, year 1002, and year 1010. Scientists now need to compare and analyze these data. According to Grinsted, would the sea level increase or decrease right after year 1000?
Ans: increase