Q: Fact 1: Plasma cells are activated B cells that secrete antibodies. Fact 2: Antibodies kill bacteria. Given the two facts above, what kills bacteria?

OPTIONS:
- rays or beams
- Plasma cells
- Cooking
- an electric stove
- Petri dish
- deal
- phlange
- evaporation

A: Plasma cells

Q: Fact 1: If something is outside during the day then that something will receive sunlight. Fact 2: If there is sun, there is sunlight, there is day. Given the two facts above, when does something receive sun?

OPTIONS:
- at night
- It gets heated up
- rays or beams
- during the day
- by indirect light
- in darkness
- after dusk
- Solar energy

A: during the day

Q: Fact 1: Erosion of soil has a negative impact on the environment. Fact 2: Desertification implies soil erosion. Given the two facts above, what has a negative impact on the environment?

OPTIONS:
- deforestation
- deserts
- cigarettes
- desertification
- humans disturb it
- environments
- weather
- harmful substances

A: desertification

Q: Fact 1: An animal requires stamina to succeed at physical activities. Fact 2: Mustangs are noted for their stamina and endurance. Given the two facts above, mustangs are noted for abilities in what?

OPTIONS:
- physical activities
- to move people
- circulatory systems
- the body's largest organ
- sense organs
- smell and taste
- genetic diversity
- Chemical energy

A:
physical activities