Answer the following question given this paragraph: Evolution occurs by natural selection, the process by which organisms with traits that better enable them to adapt to their environment will tend to survive and reproduce in greater numbers. Evolution is due to differences in the survival and reproduction of individuals within a population. Q: What is the process that allows organisms with better traits to survive and produce? Choices: - spontaneous mutation - adaptation - succession - natural selection A:
natural selection
Answer the following question given this paragraph: Cardiologist Heart disease is the leading cause of death in the United States. This is primarily due to our sedentary lifestyle and our high trans-fat diets. Heart failure is just one of many disabling heart conditions. Heart failure does not mean that the heart has stopped working. Rather, it means that the heart can't pump with sufficient force to transport oxygenated blood to all the vital organs. Left untreated, heart failure can lead to kidney failure and failure of other organs. The wall of the heart is composed of cardiac muscle tissue. Heart failure occurs when the endoplasmic reticula of cardiac muscle cells do not function properly. As a result, an insufficient number of calcium ions are available to trigger a sufficient contractile force. Cardiologists (cardi- = "heart"; -ologist = "one who studies") are doctors who specialize in treating heart diseases, including heart failure. Cardiologists can make a diagnosis of heart failure via physical examination, results from an electrocardiogram (ECG, a test that measures the electrical activity of the heart), a chest X-ray to see whether the heart is enlarged, and other tests. If heart failure is diagnosed, the cardiologist will typically prescribe appropriate medications and recommend a reduction in table salt intake and a supervised exercise program. Q: What is the leading cause of death in the united states? Choices: - suicide - automobile accidents - lung cancer - heart disease A:
heart disease
Q: Answer the following question given this paragraph: There are other measurable characteristics of a gas. One of them is temperature (T). Perhaps one can vary the temperature of a gas sample and note what effect it has on the other properties of the gas. Early scientists did just this, discovering that if the amount of a gas and its pressure are kept constant, then changing the temperature changes the volume (V). As temperature increases, volume increases; as temperature decreases, volume decreases. We say that these two characteristics are directly related. A mathematical relationship between V and T should be possible except for one thought: what temperature scale should we use? We know from Chapter 2 "Measurements" that science uses several possible temperature scales. Experiments show that the volume of a gas is related to its absolute temperature in Kelvin, not its temperature in degrees Celsius. If the temperature of a gas is expressed in kelvins, then experiments show that the ratio of volume to temperature is a constant:. Q: What happens to the volume of the gas when temperature increases but amount of gas and its pressure are constant? Choices: - nothing - volume remains constant - volume decreases - volume increases A:
A: volume increases
Question: Answer the following question given this paragraph: Life on Earth began about 3.5 to 4 billion years ago. The first life forms were single-celled organisms similar to bacteria. The first multicellular organisms did not appear until about 610 million years ago. Many different types of organisms evolved during the next ten million years, in an event called the Cambrian Explosion . This sudden burst of evolution may have been caused by some environmental changes that made the Earth's environment more suitable for a wider variety of life forms. Q: What were the first life forms found on earth similar to? Choices: - mold - ferns - viruses - bacteria A:
Answer: bacteria
*Question*
Answer the following question given this paragraph: Sugars are small, simple carbohydrates that are found in foods such as fruits and milk. The sugar found in fruits is called fructose. The sugar found in milk is called lactose. These sugars are broken down by the body to form glucose (C 6 H 12 O 6 ), the simplest sugar of all. Q: Fructose and lactose are types of sugars broken down by the body to form what, which is the simplest sugar of all? Choices: - glutamate - carbohydrate - sucrose - glucose A:
**Answer**
glucose
Q: Answer the following question given this paragraph: the distance light can travel in one year, 9.5 trillion kilometers. Q: What travels 9.5 trillion kilometers a year? Choices: - Sound - electricity - air - light A:
A: light