If nitrogen oxides harms the respiratory and circulatory systems, then harm to the respiratory and circulatory systems can come from? Answer choices: - Greenhouse gases - hydrocarbons - Sulfur dioxide - nitrogen oxides - burning coal - fossil fuels - emissions - Greenhouse gasses
nitrogen oxides

If ethologists have a dangerous job, then what type of job do ethologists have? Answer choices: - dangerous - health - useless - easy - lie detectors - it needs them - basic - recovery
dangerous

Q: If chondrocytes contain a protein called collagen, then chondrocytes contain which type of protein? Answer choices: - Actin - Keratin - white - allow growth - Collagen - ligt - positive - Hemoglobin
A: Collagen

Question: If abalones are a major food source for humans, then what is a major food source for humans? Answer choices: - honeybees - poison - abalones - carbon monoxide - rabbit - trees - insects - stomach
Answer: abalones

*Question*
If storms can cause flooding, then what can be caused by storms? Answer choices: - Tsunamis - wind - Earthquakes - erosion - Pesticides - disease - Drought - Flooding
**Answer**
Flooding

(Question)
If afish can breath in the water, then which can breath in the water? Answer choices: - whale - sharks - fish - clams - beaver - Frogs - squids - snake
(Answer)
fish