Q: What occurs when the immune system attacks harmless substances that enter the body from the outside? Choices: - cell rejection - anomalies - mutation - allergies A:
allergies

Q: The bones of the newborn skull are not fully ossified and are separated by large areas called what? Choices: - sutures - pores - fissures - fontanelles A:
fontanelles

Q: Q: If an atom gains electrons, it becomes what? Choices: - anion - a cation - neutral - an ion A:
A: an ion

Question: Q: What is the term for force that opposes motion between any touching surfaces? Choices: - gravity - stress - tension - friction A:
Answer: friction

*Question*
Q: Certain anaerobic parabasalid species exist in the digestive tracts of termites and wood-eating cockroaches, where they contribute an essential step in the digestion of this? Choices: - carbonate - fiber - nutrients - cellulose A:
**Answer**
cellulose

Q: In contrast to mammals and birds, freshwater fishes produce large volumes of very dilute what? Choices: - nitrogen - feces - blood - urine A:
urine