Problem:

Answer the following question given this paragraph:   Lignin is a tough carbohydrate molecule that is hydrophobic (“water fearing”). It adds support to vascular tissues in stems. It also waterproofs the tissues so they don’t leak, which makes them more efficient at transporting fluids. Because most other organisms cannot break down lignin, it helps protect plants from herbivores and parasites.   Q: Things that are hydrophobic repel or otherwise don't really mix with what?   A:
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A: water


Problem:

Answer the following question given this paragraph:   Vestigial structures, or structures that have lost their use through evolution, are important evidence of evolution.   Q: What do we call structures that have lost their use through evolution, which serve as important evidence of evolution?   A:
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A: vestigial


Problem:

Answer the following question given this paragraph:   Equal volumes of four different gases at the same temperature and pressure contain the same number of gaseous particles. Because the molar mass of each gas is different, the mass of each gas sample is different even though all contain 1 mol of gas. The relationships among the volume of a gas and its pressure, temperature, and amount are summarized in Figure 10.10 "The Empirically Determined Relationships among Pressure, Volume, Temperature, and Amount of a Gas". Volume increases with increasing temperature or amount but decreases with increasing pressure.   Q: What does increased temperature cause the volume to do in a gas?   A:
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A: increase


Problem:

Answer the following question given this paragraph:   Steroid hormones are made of lipids, such as phospholipids and cholesterol. They are fat soluble, so they can diffuse across the plasma membrane of target cells and bind with receptors in the cytoplasm of the cell (see Figure below ). The steroid hormone and receptor form a complex that moves into the nucleus and influences the expression of genes, essentially acting as a transcription factor. Examples of steroid hormones include cortisol and sex hormones.   Q: What are steroid hormones made of?   A:
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A:
lipids