*Question*
Q: The right atrium receives all of the systemic venous return. most of the blood flows into either the superior vena cava or this? Choices: - resulted vena cava - identical vena cava - exterior vena cava - inferior vena cava A:
**Answer**
inferior vena cava

*Question*
Q: Among vertebrates, what broad category of animals is most capable of learning? Choices: - birds - fish - reptiles - mammals A:
**Answer**
mammals

*Question*
Q: What is the term for liquid water falling from the sky? Choices: - wind - fire - mud - rain A:
**Answer**
rain

*Question*
Q: Gravitropism ensures that roots grow into the soil and that shoots grow toward what? Choices: - the north pole - trees - the south pole - sunlight A:
**Answer**
sunlight