Q: In recent years, it has been hypothesized that molecules in the environment also act as? Choices: - pathogens - homeostasis disruptors - catalysts - endocrine disruptors A:
endocrine disruptors

Q: What are substances that cannot be broken down into simpler substances with different properties called? Choices: - atoms - compounds - molecules - elements A:
elements

Q: Q: What organs need constant pressure to filter the blood? Choices: - lungs - dialysis - arteries - kidneys A:
A: kidneys

Question: Q: When the ph of precipitation is lowered because of air pollution, what results? Choices: - abnormal rain - climate change - sleet - acid rain A:
Answer: acid rain

*Question*
Q: The only invertebrates than can fly belong to what broad group, which is highly successful? Choices: - spiders - birds - bats - insects A:
**Answer**
insects

Q: Q: Along with climate, this also influences the type of vegetation that can grow in the region? Choices: - gravity - fertilizer use - population density - soil type A:
A: soil type