Answer the following question given this paragraph: Alkenes can have different shapes. They can form straight chains, branched chains, or rings. Alkenes with the same atoms but different shapes are called isomers. Smaller alkenes have relatively high boiling and melting points, so they are gases at room temperature. Larger alkenes have lower boiling and melting points, so they are liquids or waxy solids at room temperature. Q: Alkenes with the same atoms but different shapes are called what? Choices: - alcohols - monomers - isotopes - isomers A:
isomers

Answer the following question given this paragraph: Chromoplasts make and store pigments that give petals and fruit their orange and yellow colors. Q: What makes and stores pigments that give petals and fruit their orange and yellow colors? Choices: - sporozoans - protozoa - pores - chromoplasts A:
chromoplasts

Answer the following question given this paragraph: Q: Plants generally transport carbohydrates from leaves to roots and other nonphotosynthetic organs in the form of what? Choices: - glucose - potassium - chloride - sucrose A:
sucrose

Answer the following question given this paragraph: There are other forms of radioactive dating. Rocks, for example, can sometimes be dated based on the decay of 238 U . The decay series for 238 U ends with 206 Pb , so that the ratio of these nuclides in a rock is an indication of how long it has been since the rock solidified. The original composition of the rock, such as the absence of lead, must be known with some confidence. However, as with carbon-14 dating, the technique can be verified by a consistent body of knowledge. Since 238 U has a half-life of solidified about. Q: What is the term for dating a rock based on composition decay? Choices: - carbon dating - fuel dating - safe dating - radioactive dating A:
radioactive dating