The experiment set-up shown in the picture has a light-proof box with a small hole on one side. What will be the shape of the image of the arrow on the opposite wall?

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions

What gases are carried by the blood

Evolution acts upon the population of organisms and not on each individual organism