Answer the following question given this paragraph: Figure 39.21 Individuals with sickle cell anemia have crescent-shaped red blood cells. (credit: modification of work by Ed Uthman; scale-bar data from Matt Russell). Q: Individuals with sickle cell anemia have crescent-shaped what? Choices: - glial cells - white blood cells - nerve cells - red blood cells A:
red blood cells
Answer the following question given this paragraph: Mole fractions describe the fraction or percentage of a mixture that is made up of a particular substance. Q: What describe the fraction or percentage of a mixture that is made up of a particular substance. Choices: - molecular scale - atomic weight - solute level - mole fractions A:
mole fractions
Q: Answer the following question given this paragraph: An esker is a winding ridge of sand deposited by a stream of meltwater. Such streams flow underneath a retreating glacier. Q: What is a winding ridge of sand deposited by a stream of meltwater called? Choices: - sand dune - desert - oasis - esker A:
A: esker
Question: Answer the following question given this paragraph: The fovea is the region in the center back of the eye that is responsible for acute vision. The fovea has a high density of cones. When you bring your gaze to an object to examine it intently in bright light, the eyes orient so that the object's image falls on the fovea. However, when looking at a star in the night sky or other object in dim light, the object can be better viewed by the peripheral vision because it is the rods at the edges of the retina, rather than the cones at the center, that operate better in low light. In humans, cones far outnumber rods in the fovea. Q: What is the region in the center back of the eye that is responsible for acute vision? Choices: - cornea - lens - pupil - fovea A:
Answer: fovea
*Question*
Answer the following question given this paragraph: The power of the ocean modifies landforms by erosion and deposition. Landforms modified by both erosion and deposition are seen in this photo. The cliff is being eroded by incoming waves. The beach is being created as sand is being deposited. Q: By what processes does the ocean modify landforms? Choices: - splash and deposition - shape and deposition - sweeping and deposition - erosion and deposition A:
**Answer**
erosion and deposition
Q: Answer the following question given this paragraph: Q: Photoreceptors in each ocellus receive light only through the opening where there are none of which cells? Choices: - clear - opqaue - secreted - pigmented A:
A: pigmented