*Question*
Q: Bivalvia and gastropoda are classes of what phylum? Choices: - Insects - fishes - diatoms - mollusks A:
**Answer**
mollusks

*Question*
Q: Both androgen secretion and spermatogenesis occur continuously starting with what? Choices: - birth - mutation - walking - puberty A:
**Answer**
puberty

*Question*
Q: What is made up of the pinna, ear canal, and eardrum? Choices: - the epidermis - the inner ear - the nervous system - the outer ear A:
**Answer**
the outer ear

*Question*
Q: When a balloon is rubbed against hair, why do they attract each other? Choices: - constantly electron charge - lean electron charge - same electron charge - opposite electron charge A:
**Answer**
opposite electron charge