Q: Fact 1: Ants communicate with chemicals called pheromones. Fact 2: Ants are of extreme importance in the insect world. Given the two facts above, how do some insects communicate? | OPTIONS:
- sound
- sensory neurons
- Decibels
- electronic waves
- progesterone
- Vibrates
- pheromones
- radio waves
A: pheromones

Q: Fact 1: Bottleneck effect occurs when a population suddenly gets much smaller. Fact 2: Fishing pressure is relatively low due to a smaller human population. Given the two facts above, what can make the bottleneck effect occur in fish? | OPTIONS:
- increased habitat
- acid rain
- humans
- Winter
- increased food
- storms
- increased resources
- Toxicity
A: humans

Q: Fact 1: Bone provides protection for soft tissues and internal organs. Fact 2: For example the skull bones protect the brain, and the ribs protect the thoracic organs. Given the two facts above, what protects internal organs? | OPTIONS:
- Feet
- Heart
- metal
- Masks
- fungi
- fur
- Teeth
- Ribs
A: Ribs

Q: Fact 1: Pollutants have a negative impact on the environment. Fact 2: Carbon dioxide is a pollutant. Given the two facts above, what affects the environment negatively? | OPTIONS:
- sunlight
- normal weather patterns
- carbon dioxide
- cigarettes
- positivity
- Smoking
- harmful substances
- fossil fuels
A: carbon dioxide