night blindness-vitamin A deficiency
color blindness - trouble distinguishing colors
hyperopia-eyeball too short
myopia-eyeball too long
astigmatism-light refracted aspherically.
<h3><u>Explanation:</u></h3>
Night blindness is defined as the disease which involves the mal production of retinol in the rod cells of retina. This leads to the decreased sensitivity of eye to dim light.
Similarly, colour blindness is a genetic disease which is characterised by absence of a particular pigment in cone cells. This restricts the vision of a particular colour.
Hyperopia or hypermetropia is the shortening of eyeball which leads to the focusing of light rays behind the retina. So convex lenses are required to focus them on retina.
Myopia is the opposite of hypermetropia where the eyeball is elongated and the light rays doesn't reach the retina. So concave lens are required to focus the rays on retina.
Astigmatism is the case where the curvature of lens isn't correct, and the lens required for the correction is cylindrical lens
Answer:
Option-B
Explanation:
DNase I is an enzyme which acts on the DNA in its single-stranded, double-stranded and chromatin form.
The DNase acting sites on the DNA is known as the DNA I hypersensitive site. The DNase I hypersensitive site allows the DNase I to act as the condensed form becomes less condensed. This mechanism can be associated with the transcription as, during transcription, the DNA becomes less condensed and is open to DNase I enzyme.
Thus, Option-B is correct.
Answer:
You would need to attach the diagram for us to answer. (个_个)
The veins would soon start to inflate/deflate and this would inevitable leed to them breaking. This would cause spontaneous bruises.