*Question*
Answer the following question given this paragraph: Q: What kind of anatomical structure consists of several types of tissues that together carry out particular functions? Choices: - valve - frame - system - organ A:
**Answer**
organ

*Question*
Answer the following question given this paragraph: In endothermic reactions, the temperature of the products is typically lower than the temperature of the reactants. The drop in temperature may be great enough to cause liquids to freeze. That's what happens in the endothermic reaction at this URL: http://www. bbc. co. uk/schools/gcsebitesize/science/add_aqa_pre_2011/chemreac/energychangesrev1. shtml . Q: The temperature of the products is typically lower than the temperature of the reactants in what type of reaction? Choices: - autotrophic - exothermic - parabolic - endothermic A:
**Answer**
endothermic

*Question*
Answer the following question given this paragraph: Air conditioning systems that can incubate certain bacteria and mold. Q: Air conditioning systems can incubate certain bacteria and what else? Choices: - Cancer - wood - root - mold A:
**Answer**
mold

*Question*
Answer the following question given this paragraph: Did you ever see a meteor shower, like the one in Figure below ? Meteors burn as they fall through the mesosphere. The space rocks experience friction with the gas molecules. The friction makes the meteors get very hot. Many meteors burn up completely in the mesosphere. Q: What happens to meteors as they fall through the mesosphere? Choices: - they grow - they bounce - they stop suddenly - they burn A:
**Answer**
they burn