What is class and what is your book name
Answer: B
Explanation:
Seasons on Earth occur due to tilt of its axis. Earth's axis is tilted 23.5° from the vertical. As the Earth revolves around Sun, the hemisphere is points towards Sun experiences summer season and the hemisphere points away from the Sun experiences winter.
It is given that U.S. is experiencing winters. U.S. lies in the northern hemisphere. Thus, the image which depicts winters in U.S. is image B as the sun rays are falling directly in southern hemisphere and northern hemisphere is pointing away from the Sun.
The fovea centralis is tightly packed with receptors which can receive clear and highly detailed information.
The fovea centralis, or fovea, is a small depression within the neurosensory retina where visual acuity is the highest.
The fovea itself is the central portion of the macula, which is responsible for central vision.
To form high resolution images, the light must fall on the fovea, and that limits the acute vision angle to about 15 degrees.
In low light, this fovea constitutes a second blind spot since it is exclusively cones which have low light sensitivity.
Human fovea consists of 3 spectral types of cones: long wavelength cones, medium wavelength cones and short wavelength cones.
Learn more about Fovea centralis on
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