What principle do all modern cameras use to form Images?
Light rays are focused to form real images.
Light rays are scattered to form simple Images.
Light rays are focused to form virtual images.
Light rays are scattered to form virtual images.

Light rays are focused to form real images.

Explanation:

All modern cameras use light rays that are focused to form real images which is a copy of the scene in front of them.

Lenses in a camera serves as the eye of the device by which light rays enters.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.