Problem: Bill and Bob were two brothers. they were both into physical exercise, but Bill chose weight lifting, and Bob running. Given the paragraph above, please answer correctly the following question: Which brother had fewer muscles contract against a resisting force? Hint: In exercises such as weight lifting, skeletal muscle contracts against a resisting force (see Figure below ). Using skeletal muscle in this way increases its size and strength. In exercises such as running, the cardiac muscle contracts faster and the heart pumps more blood. Using cardiac muscle in this way increases its strength and efficiency. Continued exercise is necessary to maintain bigger, stronger muscles. If you don't use a muscle, it will get smaller and weakerso use it or lose it.

A: Bob

Problem: Anthony is cleaning his apartment using abrasive chemicals to make sure everything is clean. It is currently winter so his house is sealed up tight to keep it warm. Given the paragraph above, please answer correctly the following question: Given that Anthony decides to open his windows after cleaning to let fresh air in, will the amount of air pollution in his apartment increase or decrease? Hint: Recall that air pollution is due to chemical substances and particles released into the air mainly by human actions. When most people think of air pollution, they think of the pollution outdoors. But it is just as easy to have indoor air pollution. Your home or school classroom probably doesn't get much fresh air. Sealing up your home reduces heating and cooling costs. But this also causes air pollution to stay trapped indoors. And people today usually spend a majority of their time indoors. So exposure to indoor air pollution can become a significant health risk.

A: decrease

Problem: Two medical students had to study about viruses that cause cancers in humans. Brady studied about hepatitis viruses, while Dean studied about human papillomaviruses and Herpesviridae. Given the paragraph above, please answer correctly the following question: Which student read more about cancers of the skin? Hint: Hepatitis viruses can develop into a chronic viral infection that leads to liver cancer. Infection by human T-lymphotropic virus can lead to tropical spastic paraparesis and adult T-cell leukaemia. Human papillomaviruses are an established cause of cancers of cervix, skin, anus, and penis. Within the Herpesviridae, Kaposi's sarcoma-associated herpesvirus causes Kaposi's sarcoma and body-cavity lymphoma, and EpsteinBarr virus causes Burkitt's lymphoma, Hodgkin's lymphoma, B lymphoproliferative disorder, and nasopharyngeal carcinoma. Merkel cell polyomavirus closely related to SV40 and mouse polyomaviruses that have been used as animal models for cancer viruses for over 50 years.

A: Dean

Problem: Two islands were located in the Pacific Ocean. Woo island was frequently shaken by earthquakes, but Mud island had no such problems. Given the paragraph above, please answer correctly the following question: Which island experienced fewer rocks breaking because of stress? Hint: Almost all earthquakes occur at plate boundaries. All types of plate boundaries have earthquakes. Convection within the Earth causes the plates to move. As the plates move, stresses build. When the stresses build too much, the rocks break. The break releases the energy that was stored in the rocks. The sudden release of energy creates an earthquake. During an earthquake the rocks usually move several centimeters or rarely as much as a few meters. Elastic rebound theory describes how earthquakes occur ( Figure below ).

A:
Mud