Question: Q: According to the table, aluminum has an atomic number of 13. therefore, every aluminum atom has 13 protons in its what?    Choices:  - processes  - membrane  - components  - nucleus  A:
Answer: nucleus

Question: Q: What fuels provide most of the energy used worldwide?    Choices:  - hydroelectric  - solar  - renewable  - fossil  A:
Answer: fossil

Question: Q: What single-celled organism can be either a predator, decomposer, herbivore, or parasite in the food chain?    Choices:  - vertebrates  - mites  - Diatoms  - protozoa  A:
Answer:
protozoa