Toxicants that cause harm by triggering overactivation of the immune system are called ___.
a. neurotoxins
b. teratogens
c. allergens
d. antibiotics
c. allergens
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Which worldview sees humans as the planet's most important species?
A. Environmental wisdom B. Stewardship C. Economic succession D. Planetary management E. Planetary intrinsic value
Which of the following cloud types might be indicated if a cloud appears white on a visible satellite image and grey on an infrared image?
A. stratus B. cumulonimbus C. cirrostratus D. altostratus
Chernozem soils are associated with which of the following vegetation zones?
A. steppe B. taiga C. tundra D. desert
What is a characteristic of the water that is expelled from hydrothermal vents?
a. The water is colder than when entering the vent b. The water is enriched with metals. c. The water has higher concentrations of organic material d. The water has lower concentrations of dissolved gases