Q: The reverse process of moving material into a cell is the process of what? Choices: - endocytosis - proteolysis - osmosis - exocytosis A:
exocytosis

Q: When a fluorine atom gains an electron, it becomes a negative what? Choices: - hydrogen ion - sulfide ion - potassium ion - fluoride ion A:
fluoride ion

Q: Q: A potential cause of extinction, competition between different species is called what? Choices: - parasitism - intraspecific competition - mutualism - interspecific competition A:
A: interspecific competition

Question: Q: What compound has positive and negative ions? Choices: - hydrocarbon - protein - covalent - ionic A:
Answer: ionic

*Question*
Q: What is the number of electrons equal to in every electrically neutral atom? Choices: - Electrons - molecules - nucleus - protons A:
**Answer**
protons

*Question*
Q: Homes and transportation use what percent of all energy in the u.s.? Choices: - twenty five - fifteen - forty - half (fifty) A:
**Answer**
half (fifty)