Q: Q: Which outermost secondary xylem layers transport water? Choices: - the farthest - the oldest - the narrowest - the youngest A:
A: the youngest

Q: Q: Both sexes of sockeye salmon turn red with green heads just prior to what? Choices: - dying - feeding - migrating - spawning A:
A: spawning

Q: Q: What is defined as the ability to cause changes in matter? Choices: - evolution - momentum - nuclear - energy A:
A: energy

Q: Q: What element is typically used to shield things from gamma rays? Choices: - gold - silver - aluminum - lead A:
A: lead