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LenaWriter [7]
3 years ago
6

There is a spot on the retina commonly called the “blind spot.” the blind spot exists because ________.

Biology
2 answers:
DIA [1.3K]3 years ago
4 0
That is where the fibers of the optic nerve exit the eye extending into the brain. there are no rods and cones there as a result.
vovangra [49]3 years ago
3 0

Answer:

The correct answers - there are no photo-receptor in this spot and therefore no image detection.

Explanation:

Blindspot is a small part or region of the visual field of eyes on the retina which is also known as the optic disk or optic nerve head. In this portion, there is no rods or cones present which is photoreceptors that detect the image in the retina.

Blindspot is the region where the nerve fiber moves out from the back of the eye. Blindspot term is called a blind spot as it does not detect any image in this spot or portion of the retina.

Thus, the correct answer is - there are no photo-receptor in this spot and therefore no image detection.

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A mutation in _____ results in a change in _____ that sometimes produces a(n) _____ with altered structure and function.
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Answer:

A mutation in <u>DNA </u>results in a change in <u>RNA </u>that sometimes produces a <u>protein </u>with altered structure and function.

Explanation:

DNA is the hereditary material which causes gene expression in our body by producing protein. The type of protein which is produced by DNA totally depends upon the sequence of nucleotides in the DNA. But, DNA molecule does not produce protein directly. Initially it produces RNA (mRNA, tRNA, rRNA) by the process of transcription, the nucleotides in the RNA are complimentary to those in DNA. In short, the message regarding the structure and composition of the type protein to be produced by DNA is first decoded from DNA in the form of RNA. These RNA molecules then synthesize the protein as per the instructions from DNA by the process of translation.

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