Q: Which gas do people exhale during each breath? Read this paragraph and choose the correct option from the provided answers: What is this strange-looking object? Can you guess what it is? It's a model of a certain type of matter. Some types of matter are elements, or pure substances that cannot be broken down into simpler substances. Many other types of matter are compounds. The model above represents a compound. The compound it represents is carbon dioxide, a gas you exhale each time you breathe. Choices: - carbon monoxide - nitrogen - oxygen - carbon dioxide A:
carbon dioxide

Q: When the ground absorbs the water and it settles below the surface it is called what? Read this paragraph and choose the correct option from the provided answers: Choices: - wastewater - glacier - precipitation - groundwater A:
groundwater

Q: Q: When the body goes into survival mode, it's first priority is to produce enough of which substance for the brain? Read this paragraph and choose the correct option from the provided answers: Starvation When the body is deprived of nourishment for an extended period of time, it goes into "survival mode. " The first priority for survival is to provide enough glucose or fuel for the brain. The second priority is the conservation of amino acids for proteins. Therefore, the body uses ketones to satisfy the energy needs of the brain and other glucose-dependent organs, and to maintain proteins in the cells (see Figure 24.2). Because glucose levels are very low during starvation, glycolysis will shut off in cells that can use alternative fuels. For example, muscles will switch from using glucose to fatty acids as fuel. Choices: - blood - insulin - plasma - glucose A:
A: glucose

Question: Q: What is evolution that occurs over a long period of time called? Read this paragraph and choose the correct option from the provided answers: Evolution that occurs over a long period of time is called macroevolution . It might take place over millions of years. This scale of evolution occurs above the level of the species. Fossils provide evidence for evolution at this scale. The evolution of the horse family, shown in Figure below , is an example of macroevolution. Choices: - spontaneous mutation - introgression - catabolism - macroevolution A:
Answer: macroevolution

*Question*
Q: What can be switched off by a protein called the trp repressor? Read this paragraph and choose the correct option from the provided answers: Choices: - the cytokine - the chaperone protein - the genetic precursor - the operon A:
**Answer**
the operon

Q: Q: Earthquakes at convergent plate boundaries mark the location of the what? Read this paragraph and choose the correct option from the provided answers: Earthquakes at convergent plate boundaries mark the location of the subducting lithosphere. The motion of the lithosphere as it plunges through the mantle causes the quakes ( Figure below ). At greater depths, the plate heats up enough to deform plastically. Choices: - abducting lithosphere - speeding lithosphere - shorting lithosphere - subducting lithosphere A:
A: subducting lithosphere