Problem: OPTIONS:
- digestive tract
- lung system
- the body's largest organ
- circulatory system
- Veins and arteries.
- brain stem
- all liquids
- major threat to health
Q: Fact 1: Chordates have a complete digestive system and a closed circulatory system. Fact 2: Because reptiles are vertebrates, they are chordates. Given the two facts above, vertebrates have a complete digestive system and a closed what?
Answer: circulatory system

Problem:OPTIONS:
- cell phones
- messengers
- energy
- megaphones
- A Greek letter
- flashlights
- gramophones
- electricity

Fact 1: Telephones are used for communication by two people by transmitting sound. Fact 2: Cell phones are, bottom line, radios with a connection to a telephone company. Given the two facts above, what are used for two people for communication with sound?
****
A: cell phones

Fact 1: Roots have primary and secondary meristems for growth in length and width. Fact 2: Meristems are zones of intense activity. Given the two facts above, where does intense activity occur in a plant?
OPTIONS:
- Roots
- Buds
- bamboo
- fields
- Summer
- years
- Hairs
- Petals
Roots

Fact 1: Most people can survive only a few days without water. Fact 2: Water is made up of H2O molecules. Given the two facts above, what can most people only survive a few days without?
OPTIONS:
- NaCl
- television
- H20
- food
- rain
- urea
- running
- h2o

Answer: h2o

Question: Fact 1: Alternation of generations allows for both asexual and sexual reproduction. Fact 2: Plants have an alternation of generations. Given the two facts above, what allows for both asexual and sexual reproduction?
OPTIONS:
- being dead
- fungi
- amoeba
- offspring
- plants
- humans
- Flowers
- barnacles
Answer: plants

input: OPTIONS:
- Chemical energy
- resistance
- increases a body's strength
- To keep their body heat.
- most human enzymes
- aerobic capacity
- allow growth
- temperature Now, answer this question: Fact 1: Cells secrete acids and bases to maintain the proper pH for enzymes to work. Fact 2: Most human enzymes work at a optimal pH of 7.4, but other enzymes work at many different pH ranges. Given the two facts above, cells secrete acids and bases to maintain what?
A:
output:
most human enzymes