Answer the following question given this paragraph: 10.3 Control of the Cell Cycle Each step of the cell cycle is monitored by internal controls called checkpoints. There are three major checkpoints in the cell cycle: one near the end of G1, a second at the G2/M transition, and the third during metaphase. Positive regulator molecules allow the cell cycle to advance to the next stage. Negative regulator molecules monitor cellular conditions and can halt the cycle until specific requirements are met. Q: In a cell cycle, what kind of regulator molecules allow advancement to the next stage? Choices: - strong - similar - negative - positive A:
positive

Answer the following question given this paragraph: Frogs and toads are adapted for jumping. Salamanders and newts may walk or swim. Caecilians live in the water or soil and are the only amphibians without legs. Q: What is the only amphibian without legs? Choices: - alligators - frogs - newts - caecilians A:
caecilians

Answer the following question given this paragraph: Under the right conditions, light can be used to eject electrons from a solid material. Q: Light can be used to eject what from a solid material? Choices: - protons - calories - neutrons - electrons A:
electrons