Q: The third line of defense of the immune system is called? Read this paragraph and choose the correct option from the provided answers: Like the immune systems of other vertebrates, the human immune system is adaptive. If pathogens manage to get through the body's first two lines of defense, the third line of defense takes over. The third line of defense is referred to as the immune response . This defense is specific to a particular pathogen, and it allows the immune system to "remember" the pathogen after the infection is over. If the pathogen tries to invade the body again, the immune response against that pathogen will be much faster and stronger. Choices: - the sudden response - the asymptomatic response - the malignant response - the immune response A:
the immune response

Q: Phosphate-containing ocean sediments form primarily from the bodies of ocean organisms and from their what? Read this paragraph and choose the correct option from the provided answers: The Phosphorus Cycle Phosphorus is an essential nutrient for living processes; it is a major component of nucleic acids and phospholipids, and, as calcium phosphate, makes up the supportive components of our bones. Phosphorus is often the limiting nutrient (necessary for growth) in aquatic, particularly freshwater, ecosystems. Phosphorus occurs in nature as the phosphate ion (PO43-). In addition to phosphate runoff as a result of human activity, natural surface runoff occurs when it is leached from phosphate-containing rock by weathering, thus sending phosphates into rivers, lakes, and the ocean. This rock has its origins in the ocean. Phosphate-containing ocean sediments form primarily from the bodies of ocean organisms and from their excretions. However, volcanic ash, aerosols, and mineral dust may also be significant phosphate sources. This sediment then is moved to land over geologic time by the uplifting of Earth's surface. (Figure 20.13) Phosphorus is also reciprocally exchanged between phosphate dissolved in the ocean and marine organisms. The movement of phosphate from the ocean to the land and through the soil is extremely slow, with the average phosphate ion having an oceanic residence time between 20,000 and 100,000 years. Choices: - ancestors - skeletons - blood - excretions A:
excretions

Q: Q: The variable is the speed of light. for the relationship to hold mathematically, if the speed of light is used in m/s, the wavelength must be in meters and the frequency in what? Read this paragraph and choose the correct option from the provided answers: The variable is the speed of light. For the relationship to hold mathematically, if the speed of light is used in m/s, the wavelength must be in meters and the frequency in Hertz. Choices: - gigawatts - miles - centimeters - hertz A:
A: hertz

Question: Q: How does burning matter affect its mass? Read this paragraph and choose the correct option from the provided answers: Burning and other changes in matter do not destroy matter. The mass of matter is always the same before and after the changes occur. Choices: - the mass quadruples - the mass increases - the mass decreases - the mass remains the same A:
Answer: the mass remains the same

*Question*
Q: What can be used to speed up biochemical reactions? Read this paragraph and choose the correct option from the provided answers: pH values for several common materials are listed. Choices: - proteins - hormones - carbohydrates - enzymes A:
**Answer**
enzymes

Q: Q: What do you call the process that results in an animal producing offspring? Read this paragraph and choose the correct option from the provided answers: Choices: - adoption - creationism - differentiation - reproduction A:
A: reproduction