Fact 1: Mammals have a layer of fat under the skin to help insulate the body. Fact 2: Insulation is very important in a cold climate like Arkhangelsk. Given the two facts above, what aspect of mammals is especially important in cold climates?

OPTIONS:
- layer of body fat under skin
- lips
- sweat glands
- To conserve energy
- toes
- food and shelter
- It helps them survive
- by keeping them warm

Answer: layer of body fat under skin

Problem: OPTIONS:
- desire
- sound
- saliva
- humans
- Light
- DNA
- zoos
- gametes
Q: Fact 1: Sound can be used for communication by animals. Fact 2: For mating, communication is between individuals of the same organism. Given the two facts above, what do animals use to find a mate?
Answer: sound

Problem:OPTIONS:
- Energy.
- carbon
- pan
- glucose
- matter
- Energy
- fungi
- food

Fact 1: Biomass is the total mass of organisms at a trophic level. Fact 2: Fourty percent of biomass is carbon. Given the two facts above, what is fourty percent of the total mass of organisms at a trophic level?
****
A: carbon

Fact 1: Cells have multiple repair mechanisms to fix mutations in DNA. Fact 2: DNA excision repair is a major cellular response to DNA damage. Given the two facts above, what is one method of fixing DNA mutations?
OPTIONS:
- Exfoliation
- agriculture
- ligt
- evaporation
- A computer
- acetic acid
- Cooking
- Excision
Excision

Fact 1: Fungi have special structures for penetrating a host. Fact 2: Fungi include yeasts, molds, and fleshy fungi. Given the two facts above, what has special structures for penetrating a host?
OPTIONS:
- blood
- water
- sunlight
- gills
- bacteria
- Oak
- yeasts
- parasites

Answer: yeasts

input with options: Fact 1: Hydropower requires damming a river. Fact 2: Many dams along rivers and creeks help prevent floods. Given the two facts above, hydropower requires what?
OPTIONS:
- a hydraulic system
- increases a body's strength
- helping to prevent floods
- Electric generators
- flow of electrons
- energy of moving objects
- power stations
- fissures of hot, acidic water
output:
helping to prevent floods