Fact 1: Oxygen is just one substance transported by the blood. Fact 2: Hemoglobin transports oxygen in blood. Given the two facts above, what is just one substance transported by hemoglobin?

OPTIONS:
- gas
- glucose
- proteins
- carbon
- oxygen
- an anion
- hair
- Energy

Answer: oxygen

Fact 1: Sonar is used to find the location of an object. Fact 2: Active Sonar Active sonars transmit acoustic energy and detect targets by echolocation. Given the two facts above, what is used to find objects underwater?

OPTIONS:
- echolocation
- a hydraulic system
- heat energy
- Electrical energy
- dolphins
- mussels
- by indirect light
- rays or beams

Answer: echolocation

Fact 1: Organisms cluster around hydrothermal vents in the ocean floor. Fact 2: Animals at underwater hydrothermal vents are unique. Given the two facts above, what are organisms on the ocean floor?

OPTIONS:
- conventional
- common
- unique
- protected
- parasites
- tortoises
- normal
- bacteria

Answer: unique

Fact 1: Menopause occurs when menstruation stops occurring, usually in middle adulthood. Fact 2: Menopause The Changes of Menopause Menopause marks the close of a woman's reproductive years. Given the two facts above, a woman's reproductive years usually ends at what stage of life?

OPTIONS:
- young adulthood
- teen years
- our star
- It decreases
- Plant growth is reduced
- old age
- our nearest star
- middle adulthood

Answer:
middle adulthood