Answer the following question given this paragraph: The Hardy-Weinberg model describes how a population can remain at genetic equilibrium , referred to as the Hardy-Weinberg equilibrium. Genetic equilibrium occurs when there is no evolution within the population. In other words, the frequency of alleles (variants of a gene) will be the same from one generation to another. At genetic equilibrium, the gene or allele frequencies are stable they do not change. For example, let's assume that red hair is determined by the inheritance of a gene with two alleles R and r . The dominant allele, R , encodes for non-red hair, while the recessive allele, r , encodes for red hair. If a population's gene pool contains 90% R and 10% r alleles, then the next generation would also have 90% R and 10% r alleles. However, this only works under a strict set of conditions. Q: Genetic equilibrium occurs when what process doesn't exist within the population? Choices: - movement - reproduction - variation - evolution A:
evolution
Answer the following question given this paragraph: Lipids are biochemical compounds such as fats and oils. Organisms use lipids to store energy. In addition to carbon and hydrogen, lipids contain oxygen. Q: Lipids are biochemical compounds such as fats and? Choices: - vegetables - salts - minerals - oils A:
oils
Q: Answer the following question given this paragraph: Behind every fart is an army of gut bacteria undergoing some crazy biochemistry. These bacteria break down the remains of digested food through fermentation, creating gas in the process. Learn what these bacteria have in common with beer brewing at http://youtu. be/R1kxajH629A?list=PLzMhsCgGKd1hoofiKuifwy6qRXZs7NG6a . Q: Which process helps bacteria in the gut break down the remains of the digested food? Choices: - synthesis - decomposition - oxidation - fermentation A:
A: fermentation
Question: Answer the following question given this paragraph: Biofuels are useful because they are liquid. Biofuels can go into a gas tank unlike many other types of alternative energy. Q: What form do biofuels take that makes them very useful? Choices: - crystals - solid - chemical - liquid A:
Answer: liquid
*Question*
Answer the following question given this paragraph: Viruses are so small that they can be seen only with an electron microscope. Before electron microscopes were invented, scientists knew viruses must exist. How did they know? They had demonstrated that particles smaller than bacteria cause disease. Q: They had demonstrated that particles smaller than bacteria cause what? Choices: - blood - flight - damage - disease A:
**Answer**
disease
Answer the following question given this paragraph: At the end of the Precambrian, a mass extinction occurred. In a mass extinction , the majority of species die out. The Precambrian mass extinction was the first of six mass extinctions that occurred on Earth. It's not certain what caused this first mass extinction. Changes in Earth's geology and climate were no doubt involved. Q: What was the first mass extinction that occurred on earth? Choices: - late Devonian mass extinction - paleozoic mass extinction - proterozoic mass extinction - precambrian mass extinction A:
precambrian mass extinction