*Question*
Q: Which layer of soil experiences the most weathering? Read this paragraph and choose the correct option from the provided answers: Soil develops over time and forms soil horizons. Soil horizons are different layers of soil with depth. The most weathering occurs in the top layer. This layer is most exposed to weather! It is where fresh water comes into contact with the soil. Each layer lower is weathered just a little bit less than the layer above. As water moves down through the layers, it is able to do less work to change the soil. Choices: - subsoil - bedrock - humus - top layer A:
**Answer**
top layer

*Question*
Q: What force opposes a motion of a moving body? for example a car breaking on a road. Read this paragraph and choose the correct option from the provided answers: Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engine can cause the parts to wear out. Other examples of friction are illustrated in the two Figures below and below . You can see an animation showing how friction opposes motion at this URL:. Choices: - tension - vibration - thermal - friction A:
**Answer**
friction

*Question*
Q: What has a pseudocoelom and hydrostatic skeleton? Read this paragraph and choose the correct option from the provided answers: Roundworms make up the phylum Nematoda. They have a pseudocoelom and hydrostatic skeleton. Their body is covered with tough cuticle. Free-living roundworms are found mainly in freshwater habitats. Parasitic roundworms have a variety of hosts, including humans. Choices: - vertebrates - omnivores - gymnosperms - roundworms A:
**Answer**
roundworms

*Question*
Q: Macrophages, which can swallow and destroy old and dying cells, bacteria, or viruses, are large types of what cells? Read this paragraph and choose the correct option from the provided answers: Macrophages are large WBCs that can also swallow and destroy old and dying cells, bacteria, or viruses. Below, a macrophage is attacking and swallowing two particles, possibly disease-causing pathogens ( Figure below ). Macrophages also release chemical messages that cause the number of WBCs to increase. Choices: - red blood cells - white brain cells - dendritic cells - white blood cells A:
**Answer**
white blood cells