Answer: Light goes into the eye via the cornea, it then pass through the pupil, the lens, the vitreous humor and finally forms an image on the retina.
Explanation:
Light goes into the eye via the cornea. The cornea is a clear, dome-shaped surface that covers the front of the eye.
From the cornea, the light passes through the pupil. The pupil regulates the amount of light passing through.
From the pupil, , light hits the lens. The lens is the clear structure inside the eye. It focuses light rays onto the retina.
Subsequently, light passes through the vitreous humor. A clear, jelly-like substance that fills the center of the eye. It helps to keep the eye round in shape.
Finally, the light reaches the retina where the image is formed the image is usually inverted. The retina is a light-sensitive nerve layer that is situated at the back of the eye.
The main function of the optic nerve is to carry the signals to the visual cortex of the brain. The visual cortex turns the signals into images.
Answer:
<u>A common element among all the river valley civilizations was irrigation systems that moved water to crops and settlements</u>
Explanation:
- <u>River Valley civilizations where the civilizations that were found on the banks of the river like the Mesopotamia ,Indus valley civilization.</u>
- <u>These civilization where agriculture based civilization as they depended on river for drinking water and irrigational activities</u>
Answer:
1.Improve sanitation facilities by providing toilets and latrines that flush into a sewer or safe enclosure.
2.Promote good hygiene habits through education. ...
3.Implement rainwater harvesting systems to collect and store rainwater for drinking or recharging underground aquifers.
The best answer is B
Deltas are wet lands that form as rivers empty their water and sediments into another body of water such as an ocean, lake, or another river. Deltas can also empty into land although this is less common.
A river moves more slowly as it nears its end. This causes sediment, solid material that has been carried downstream by the water to fall to the river bottom.
The slowing of the river and the build up of sediment allows the river to break up from its single channel to several channels forming a triangular flow at the mouth called a delta.
Answer:
Ectopic pregnancy can cause the burst of fallopian tube. If previous ectopic pregnancy occured then again onset of this type of pregnancy may lead to life threatening bleeding. Having the abdominal surgery before may also proved as a risk.
