Q: Variation in muscle cells gives further insight into some benefits of what type of respiration? Choices: - natural - enzymatic - aerobic - anaerobic A:
anaerobic

Q: What type of weathering breaks rock into smaller pieces? Choices: - fluid weathering - chemical erosion - chemical weathering - mechanical weathering A:
mechanical weathering

Q: Q: How many types of antigens can an antibody match? Choices: - two - four - infinite - one A:
A: one

Question: Q: What do cells secrete that binds to receptors? Choices: - stress - endorphans - proteins - factor A:
Answer: factor

*Question*
Q: By breaking down wastes and remains of dead organisms, decomposers perform what function in an ecosystem? Choices: - reproduction - symbiosis - collecting - recycling A:
**Answer**
recycling

(Question)
Q: Plaque is surgically removed from the walls of a vessel in which surgery? Choices: - discectomy - lumpectomy - arthroscopy - endarterectomy A:
(Answer)
endarterectomy