Q: The reactions between alkali metals and water are particularly vigorous and include the rapid production of large quantities of what gas? Choices: - helium - oxygen - carbon - hydrogen A:
hydrogen

Q: Cephalopods have three hearts that pump blood of what color? Choices: - purple - Green - Red - blue A:
blue

Q: Q: What are the primary producers in terrestrial biomes? Choices: - soil - gases - animals - plants A:
A: plants

Question: Q: What may be lost when waves travel through matter, but not when they travel through space? Choices: - matter - frequency - threshold - energy A:
Answer: energy

*Question*
Q: What type of plants have vascular tissue but do not have seeds? Choices: - rocky vascular plants - ofen vascular plants - starchy vascular plants - seedless vascular plants A:
**Answer**
seedless vascular plants

(Q).
Q: What type of blood cells transport oxygen to the tissues so they can function? Choices: - white blood cells - mutated blood cells - depleted blood cells - red blood cells A:
(A).
red blood cells