Q: Fact 1: Brain cells die quickly if their oxygen supply is cut off. Fact 2: Blood carries oxygen to the brain. Given the two facts above, brain cells die quickly if what supply gets cut off? | OPTIONS:
- alveoli
- blood
- CO 2
- hydrogen
- Air
- Energy.
- electric pulses
- carbon dioxide
A: blood

Q: Fact 1: Most pituitary hormones control other endocrine glands. Fact 2: Prolactin is another hormone made in the pituitary gland. Given the two facts above, what controls other endocrine glands? | OPTIONS:
- tropical
- cellular respiration
- humans
- prolactin
- acetic acid
- photosynthesis
- organ
- animals
A: prolactin

Q: Fact 1: Excretion is the process of removing wastes and excess water from the body. Fact 2: Solid waste is called feces. Given the two facts above, what is the process of removing feces and excess water from the human body called? | OPTIONS:
- recycling
- salivation
- waste production
- excretion
- Exfoliation
- perspiration
- Deposition.
- Deposition
A: excretion

Q: Fact 1: Prokaryotes are single-celled organisms that lack a nucleus. Fact 2: Prokaryotes All bacteria are prokaryotes. Given the two facts above, what are single-celled organisms that lack a nucleus? | OPTIONS:
- Leeuwenhoek
- orchids
- Most plants
- barnacles
- PDAs
- bacteria
- cacti
- ferns
A: bacteria