*Question*
Q: What is the tubular passageway through which the embryo or fetus leaves the mother's body during birth? Choices: - cervix - penis - uterus - vagina A:
**Answer**
vagina

*Question*
Q: Ethylene, gibberellins, cytokinins, absciscic acid, and auxins are examples of what? Choices: - insect hormones - animal proteins - animal hormones - plant hormones A:
**Answer**
plant hormones

*Question*
Q: Free atoms are spherical in shape, so the relative sizes of the elements can be compared by looking at each atom's atomic what? Choices: - weight - axis - angles - radius A:
**Answer**
radius

*Question*
Q: In a food chain, only about 10 percent of what passes to the next level? Choices: - mineral - vitamins - hydrogen - energy A:
**Answer**
energy