Q: Vertebrates have evolved more complex digestive systems, with some species having multi-chambered types of what organ? Choices: - respiratory - skin - heart - stomach A:
stomach

Q: What change the physical properties of solvents? Choices: - molecules - cells - chemical reactions - solutes A:
solutes

Q: Q: What is the term for the average number of individuals in a population for a given area? Choices: - result density - population structure - Area Density - population density A:
A: population density

Question: Q: What female flower structure, which is part of the pistil, receives the pollen grains and passes them to the ovary? Choices: - sepal - style - ovary - stigma A:
Answer: stigma

*Question*
Q: What is the common word for potential difference in a circuit? Choices: - watt - velocity - frequency - voltage A:
**Answer**
voltage

Q: Q: In the periodic table, elements are arranged from left to right according to what property? Choices: - metallic mass - real mass - major mass - atomic mass A:
A: atomic mass