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slega [8]
3 years ago
13

In the visual system, the major purpose of the iris of the eye is to

Biology
1 answer:
Irina18 [472]3 years ago
5 0

The major purpose of the iris in the eye in terms of the visual system is focusing the light on the retina as the iris is responsible of managing the light passing or reaching in the retina of the eyes.

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A scientist isolated the Hepatitis B surface protein gene and introduced it into the DNA of a banana plant. The scientist tested
omeli [17]

Answer:

A. The gene for surface protein was transcribed and translated.

Explanation:

Because all living organisms use the same genetic code, it is possible to express genes from one organism in the other. In this case, the DNA sequence that corresponds to the hepatitis B surface protein gene has been inserted into the banana, and the protein is expressed.

For the protein to be expressed, the gene must have been successfully transcribed into an mRNA by the banana plant machinery. This mRNA has then been translated into a protein that means the hepatitis B surface protein is now present in the cell.

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3 years ago
1. In addition to mechanical and chemical digestion of food, the stomach's other major function is: carbohydrate and nucleic aci
Alenkasestr [34]

Answer: Food storage

Explanation:

Stomach is a small pouch like structure which has the ability to store food temporarily.The storage of the food temporarily takes place in the stomach. The food that we eat reaches to the stomach by the help of food pipe.

Here, the food is stored until it is completely broken down into simpler form and enzymes act on them.

The food is then absorbed in the small intestine. But before this food is temporarily stored in the stomach where all the digestive juices and enzymes come to act on the food.

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3 years ago
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4. what two main things happen during Prophase of Mitosis? Why is each necessary for the cell to divide? What
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Answer:

The two main things happen during Prophase of Mitosis are given below.

1) In prophase stage of mitosis, condensation of chromosomes occurs which is necessary for the formation of daughter cells.

2) Breakdown of nuclei occurs and moves to the opposite poles.

If this phase is not take place during mitosis, the cell will not divide into daughter cells

3 0
3 years ago
What genetic factors might be responsible for a change in an organism's body plan
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A genetic mutation. It's known as malformation. It can be caused by a trisomy in one of the alleles, or an affected gene.
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How are species introduced to new ecosystems
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Speciation I believe..
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