Q: Snails, scallops, and squids are what type of invertebrate? Choices: - crustacean - algae - arthropod - mollusk A:
mollusk

Q: What force pulls bodies with mass together? Choices: - thermal - solar - isolation - gravity A:
gravity

Q: Q: What are color and hardness physical properties of? Choices: - cells - ions - elements - matter A:
A: matter

Question: Q: Nitrogen is an important macronutrient because it is part of nucleic acids and proteins. atmospheric nitrogen, which is the diatomic molecule n2, or dinitrogen, is the largest pool of nitrogen in these? Choices: - gas planets - desert biomes - aquatic ecosytems - terrestrial ecosystems A:
Answer: terrestrial ecosystems

*Question*
Q: Green algae and land plants are closely what? Choices: - unrelated - foreign - different - related A:
**Answer**
related

(Q).
Q: What is the functional unit of compact bone? Choices: - the boron - the canton - the auteron - the osteon A:
(A).
the osteon