Q: What is the term for interactions between individuals of different species over an extended period of time which impact the abundance and distribution of the associating populations? Choices: - parasitic relationships - cooperative evolution - food chain - symbiotic relationships A:
symbiotic relationships

Q: One of the main features all vetebrates have in common is what? Choices: - hard shell - brain - skeleton - backbone A:
backbone

Q: What play an important role in the modulation of the nuclear chain reaction? Choices: - radiation rods - control neutrons - particle rods - control rods A:
control rods

Q: If a fixed amount of gas maintains a perfectly inversely proportional relationship between volume and pressure, then what else must be constant about the gas? Choices: - density - friction - surface tension - temperature A:
temperature