Q: The vertebrate circulatory system enables blood to deliver ________ and remove wastes throughout the body. Choices: - hydrogen and nutrients - acid and nutrients - fluid and nutrients - oxygen and nutrients A:
oxygen and nutrients

Q: The ordovician-silurian extinction event is the first recorded mass extinction and the second largest. during this period, about what percent of marine species went extinct? Choices: - 10 percent - 99 percent - 40 percent - 85 percent A:
85 percent

Q: Q: What is the name of the process where light is produced without heat? Choices: - radiation - effervescence - fluorescence - luminescence A:
A: luminescence

Question: Q: What do you call resources that can be replaced at the rate they are being used? Choices: - viable - abundant - innovative - renewable A:
Answer: renewable

*Question*
Q: Connective tissues typically have three characteristic components in common: cells, large amounts of amorphous ground substance, and what else? Choices: - antioxidants - hormones - white blood cells - protein fibers A:
**Answer**
protein fibers

Q: Q: The first plants probably evolved from what? Choices: - dry green algae - moss - mould - aquatic green algae A:
A: aquatic green algae