Q: When cardiac muscle contracts, the heart does what? Choices: - cardiac arrest - irregular heartbeat - heart murmur - pumps blood A:
pumps blood

Q: What bodily defense can be acquired in an active or passive way, and can be natural or artificial? Choices: - skin - membrane - nerves - immunity A:
immunity

Q: Q: What changes from heat or pressure during metamorphism? Choices: - carbohydrates - grains - fossils - minerals A:
A: minerals

Question: Q: Protists are the simplest of what? Choices: - prokaryotes - plants - fungi - eukaryotes A:
Answer: eukaryotes

*Question*
Q: Synostoses unite the sacral vertebrae that fuse together to form the what? Choices: - young sacrum - lower sacrum - permanent sacrum - adult sacrum A:
**Answer**
adult sacrum

Q: What does the armor including spines in some species offer? Choices: - nutrition - protection from cold - energy - protection from predators A:
protection from predators