Q: What is defined as an antigen that causes an allergy? Choices: - an expectorant - a disinfectant - a pollutant - an allergen A:
an allergen

Q: Biomass can also be processed to make what kind of fuel? Choices: - hydrogen fuel - gasoline - fossil - biofuel A:
biofuel

Q: Q: What bone cell is responsible for forming new bone and is found in the growing portions of bone, including the periosteum and endosteum? Choices: - epithelial - congenial - fibroblasts - osteoblast A:
A: osteoblast

Question: Q: What is used to fluoridate drinking water to promote dental health Choices: - carbon fluoride - calcium fluorine - carbon fluorine - calcium fluoride A:
Answer: calcium fluoride

*Question*
Q: Mixtures that have the same composition throughout are known as what kinds of mixtures? Choices: - contiguous - zygomatic - heterogeneous - homogeneous A:
**Answer**
homogeneous

Q: Q: What carries small pollen grains farther than they otherwise would go? Choices: - humidity - steam - birds - wind A:
A: wind