Marlene wakes up early in the morning and her room is fairly dark. She looks over and sees her shirt hanging on a hook. She knows it's her red shirt because she hung it up there before she went to bed, but in the dark she cannot see its color. It looks dark gray to her. Why is that?

 Cones in eyes are ineffectual in dim light

Explanation:

Cones are photoreceptor cells of eye that provide different response towards varying wavelength of light .They can effectively function in bright light and provide color vision of things.They tend to become ineffective in dim light or darkness as photoreception becomes improper.

According to the question, Marlene's shirt is looking dark grey in color in darkness rather than red(actual color in brightness) because cones of eyes have become ineffective in darkness

raliegh, north ! hope this

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .