*Question*
Answer the following question given this paragraph: Freshwater marshes and swamps are characterized by slow and steady water flow. Bogs develop in depressions where water flow is low or nonexistent. Bogs usually occur in areas where there is a clay bottom with poor percolation. Percolation is the movement of water through the pores in the soil or rocks. The water found in a bog is stagnant and oxygen depleted because the oxygen that is used during the decomposition of organic matter is not replaced. As the oxygen in the water is depleted, decomposition slows. This leads to organic acids and other acids building up and lowering the pH of the water. At a lower pH, nitrogen becomes unavailable to plants. This creates a challenge for plants because nitrogen is an important limiting resource. Some types of bog plants (such as sundews, pitcher plants, and Venus flytraps) capture insects and extract the nitrogen from their bodies. Bogs have low net primary productivity because the water found in bogs has low levels of nitrogen and oxygen. Q: What develops in depressions where water flow is low or nonexistent? Choices: - swamps - ponds - sinkholes - bogs A:
**Answer**
bogs

*Question*
Answer the following question given this paragraph: For these plants, the name says it all. Vascular seedless plants have vascular tissue but do not have seeds. Remember that vascular tissue is specialized tissue that transports water and nutrients throughout the plant. The development of vascular tissue allowed these plants to grow much taller than nonvascular plants, forming ancient swamp forests. Most of these large vascular seedless plants are now extinct, but their smaller relatives still remain. Vascular tissue includes xylem, which transports water from the roots to the rest of the plant; and phloem, which transports sugars and nutrients from the leaves throughout the plant. Q: What is the specialized tissue that transports water and nutrients throughout the plant and allows these plants to grow taller? Choices: - blood vessels - dioxide tissue - fiber tissue - vascular tissue A:
**Answer**
vascular tissue

*Question*
Answer the following question given this paragraph: Most scientists agree that the Earth itself is not a living thing. However, the Earth does have some aspects of life. Some scientists argue that the Earth maintains homeostasis, a stable state, just like a living organisms. Q: The earth is like organisms in that it maintains a stable state, which is also known as what? Choices: - ketosis - hibernation - dormancy - homeostasis A:
**Answer**
homeostasis

*Question*
Answer the following question given this paragraph: Speed may be constant, but often it varies from moment to moment. Speed at any given instant is called instantaneous speed. It is much more difficult to calculate than average speed. Q: What is speed at any given instant called? Choices: - spontaneous speed - marginal speed - relative speed - instantaneous speed A:
**Answer**
instantaneous speed