The cell can be thought of as a system. A system usually consists of many parts that work together. A system will not function as well if
one part is not working properly. We as humans use systems every
day, such as a bicycle. Some of the parts in your bike are the gears,
the brakes, and the materials used to make the bike frame. What
would happen to a bicycle if one of the parts, such as the brakes,
stopped working?

Where is the only location in the united states where you drive on the left side of the road?

Plants in the tundra biomes have had to adapt to live long periods of time without a. cool temperatures b. sunlight c. oxygen d. water

Based on your knowledge of industrialization, which of the following statements best describes what is happening in this photo taken in the us around 1910? a. the children pictured here likely worked a 4 - 6-hour shift after school, five days a week, for minimum wage. b. the children pictured here are working illegally, as child labor was prohibited in the late 1880s. the children pictured here likely worked a 12-hour day, six days a week, for about one dollar a week d. the children pictured here likely earned good wages, were protected from risk of injury, and were likely to have a successful, long-term career in this industry.