Q: If some insects communicate with chemicals called pheromones, then how do some insects communicate? Answer choices: - sound - sensory neurons - Decibels - electronic waves - progesterone - Vibrates - pheromones - radio waves
A: pheromones

Q: If humans can make the bottleneck effect occur in fish, then what can make the bottleneck effect occur in fish? Answer choices: - increased habitat - acid rain - humans - Winter - increased food - storms - increased resources - Toxicity
A: humans

Q: If ribs protect internal organs, then what protects internal organs? Answer choices: - Feet - Heart - metal - Masks - fungi - fur - Teeth - Ribs
A: Ribs

Q: If carbon dioxide has a negative effect on the environment, then what affects the environment negatively? Answer choices: - sunlight - normal weather patterns - carbon dioxide - cigarettes - positivity - Smoking - harmful substances - fossil fuels
A: carbon dioxide