Fact 1: Male dogs use pheromones in urine to mark their territory. Fact 2: Pheromones are natural aphrodisiacs. Given the two facts above, what do male dogs use in urine to mark their territory?

OPTIONS:
- Natural aphrodisiacs
- competing for resources
- Tails
- Urine cleaner
- Something coming from a gland
- Chemical energy
- an area swollen with pus
- Chew toys

Answer: Natural aphrodisiacs

Problem: OPTIONS:
- genders
- music
- Chlorophyll
- trees
- Plants growth
- offspring
- rays or beams
- infection
Q: Fact 1: Alternation of generations allows for both asexual and sexual reproduction. Fact 2: Asexual reproduction gives offspring similar to parents. Given the two facts above, alternation of generations allows for different methods of producing:?
Answer: offspring

Problem:OPTIONS:
- Energy
- Plants growth
- food chain
- agriculture
- Animal survival
- Energy.
- energy usage
- kinetic energy

Fact 1: Biomass is the total mass of organisms at a trophic level. Fact 2: Each of the steps in the food chain is a trophic level . Given the two facts above, biomass is the total mass of organisms at a step in the what?
****
A: food chain

Fact 1: Aairplane is used for moving people across bodies of water. Fact 2: Airplanes are responsible for air, noise, and water pollution. Given the two facts above, what pollutes the environment?
OPTIONS:
- bacteria
- airplanes
- deforestation
- moon
- sun
- cells
- Smoking
- flooding
airplanes

Fact 1: Transportation technology is used for moving people. Fact 2: Supersonic transport is a viable means of transportation. Given the two facts above, which of the following is the fastest that people can be moved with current technology?
OPTIONS:
- Riding a bike
- bicycle
- speed of light
- supersonic
- Summer
- superluminal
- electricity
- highway speed

Answer: supersonic

input with options: Fact 1: Aging is associated with the death of cells. Fact 2: Apoptosis means cell death. Given the two facts above, what is a natural part of aging?
OPTIONS:
- Smoking
- apoptosis
- regeneration
- illness
- stimulation
- cracking
- Weight
- firm skin
output:
apoptosis