Problem: OPTIONS:
- fur
- magnetism
- eyes
- scales
- hair
- skin
- wool
- cats
Q: Fact 1: Hair is a fiber that is found only in mammals. Fact 2: All mammals have fur or hair. Given the two facts above, what is unique to mammals?
Answer: fur

Problem:OPTIONS:
- It becomes dormant
- Plant growth is reduced
- in the autumn season
- deforestation
- Physical weathering
- in the winter season
- in the spring season
- in the freezing season

Fact 1: The color of leaves on deciduous trees usually changes in the autumn season. Fact 2: Fall colors begin as deciduous trees lose their leaves. Given the two facts above, fall begins as deciduous trees lose their leaves when?
****
A: in the autumn season

Fact 1: All chemical reactions require activation energy to get started. Fact 2: Catalysts lower the activation energy for reactions. Given the two facts above, what do catalysts do?
OPTIONS:
- metabolic reaction
- breathe
- get chemical reactions started
- Slowing the transfer of heat
- A compound that donates proton
- fertilize eggs
- have a positive impact on the environment
- inhibit chemical reactions
get chemical reactions started

Fact 1: Zinc has a positive impact on the healing of wounds. Fact 2: If an animal is wounded then the wound is healed. Given the two facts above, what does zinc have a positive impact on?
OPTIONS:
- humans
- gravity
- the skin
- density
- cells
- plants
- clouds
- animals

Answer: animals

Question: Fact 1: Producers use energy and inorganic molecules to make food. Fact 2: Minerals are inorganic substances. Given the two facts above, what use energy and minerals to make food?
OPTIONS:
- trees
- plant life
- humans
- producers
- bears
- elephants
- Most plants
- ferns
Answer: producers

input: OPTIONS:
- harmful substances
- bioaerosols
- rapid expansion
- Allergies
- anemia
- it needs them
- Chemical energy
- memory cells Now, answer this question: Fact 1: Active immunity results when an immune response to a pathogen produces memory cells. Fact 2: Pathogens are germs that cause disease. Given the two facts above, active immunity is when an immune response occurs after a germ produces what?
A:
output:
memory cells