*Question*
Q: What do seismic waves prove about the inner core? Choices: - it is liquid - it is hot - it is layered - it is solid A:
**Answer**
it is solid

*Question*
Q: Unlike an adult sponge, what stage is motile due to cilia that propel it through water? Choices: - parasite - zygote - pupa - larva A:
**Answer**
larva

*Question*
Q: What gases move in and out of blood during gas exchange? Choices: - oxygen, carbon monoxide - nitrogen, carbon dioxide - oxygen, nitrogen - oxygen, carbon dioxide A:
**Answer**
oxygen, carbon dioxide

*Question*
Q: What do nearly all animals have in common with regards to digestion? Choices: - external digestion of food - complete digestion of food - problematic digestion of food - internal digestion of food A:
**Answer**
internal digestion of food