Answer the following question given this paragraph: Alkynes are unsaturated hydrocarbons with at least one triple bond between carbon atoms. Q: What are unsaturated hydrocarbons with at least one triple bond between carbon atoms? Choices: - amines - lipids - ketones - alkynes A:
alkynes
Answer the following question given this paragraph: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. They include crocodiles, alligators, lizards, snakes, and turtles. The reptile class is one of the largest classes of vertebrates. It consists of all amniotes except birds and mammals. Q: What are a class of tetrapod vertebrates that produce amniotic eggs called? Choices: - mammals - amphibians - insects - reptiles A:
reptiles
Q: Answer the following question given this paragraph: Some of the pollutants from fossil fuels can be filtered out of exhaust before it is released into the air ( Figure below ). Other pollutants can be changed to harmless compounds before they are released. Two widely used technologies are scrubbers and catalytic converters. Q: Scrubbers and catalytic converters are examples of technologies that change what into harmless compounds? Choices: - contaminants - toxins - mutations - pollutants A:
A: pollutants
Question: Answer the following question given this paragraph: Other dry climates get a little more precipitation. They are called steppes . These regions have short grasses and low bushes ( Figure below ). Steppes occur at higher latitudes than deserts. They are dry because they are in continental interiors or rain shadows. Q: What is the type of landscape that occurs at higher latitudes than deserts, has short grasses and low bushes, and are dry because they are in continental interiors? Choices: - tundra - plains - plateau - steppe A:
Answer: steppe
*Question*
Answer the following question given this paragraph: Besides entertaining a cat, laser light has many other uses. One use is carrying communication signals in optical fibers. Sounds or pictures are encoded in pulses of laser light, which are then sent through an optical fiber. All of the light reflects off the inside of the fiber, so none of it escapes. As a result, the signal remains strong even over long distances. More than one signal can travel through an optical fiber at the same time, as you can see in the Figure below . Optical fibers are used to carry telephone, cable TV, and Internet signals. Q: Sounds or pictures can be encoded in pulses of what, which are then sent through an optical fiber? Choices: - kinetic energy - microwaves - quasars - laser light A:
**Answer**
laser light
Answer the following question given this paragraph: Single-celled organisms do not need blood. They obtain nutrients directly from and excrete wastes directly into their environment. The human organism cannot do that. Our large, complex bodies need blood to deliver nutrients to and remove wastes from our trillions of cells. The heart pumps blood throughout the body in a network of blood vessels. Together, these three componentsblood, heart, and vesselsmakes up the cardiovascular system. This chapter focuses on the medium of transport: blood. Q: What type of organisms do not need blood? Choices: - cold-blooded - vertebrate - marine - single-celled A:
single-celled