Bacteria cells have a rigid cell that gives the bacteria its shape.

The outermost structure of the bacteria cell is the, which comes in contact with the environment.

Some bacteria have, or whiplike tails that spin to propel them forward.

If an object travels 136 miles in 2.5 hours, what is its average speed

Why are so many European languages spoken in Africa? Extensive travel to Europe due to air travel Colonization of Africa by European countries Ancient trade with Europe The belief in Africa that everyone should speak more than one language.

Which of the following rivers is the second-longest river in the world, stretches for more than 4,000 miles, and flows through Brazil? A. the Paraná River B. the Mississippi River C. the Nile River D. the Amazon River

What happens to the older crust during seafloor spreading?

The Gulf Stream is a warm water current that flows away from the equator to northern Europe. Which of the following does this cause? a. crashes of warm and cool water in the ocean b. colder climates near the equator c.

1. Describe the most important diagnostic properties in igneous rocks. 2. What minerals would you expect to form in basalt? (Hint: Consider composition and Bowen's reaction series). Explain your answer.

What is the most important role of the ecosystems of the Andes? A. Keep the environment stable and reduces air pollution B. Reduce the chance of floods, desertification, and landslides C. Regulate the availability of freshwater D. All of the above

All of the following are examples of thematic maps except:

Which is used by scientists as evidence that Earth's inner core is solid? O A. S waves cannot travel through the inner core, creating a shadow zone. O B. Seismic waves change speed when they go from the inner core to the outer core. O C.

What role did geography play in the early African kingdoms? Volcanic eruptions scared away attackers. Mineral deposits brought wealth and power. The Great Rift separated them from the continent. Tropical storms extended the growing season.