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sergey [27]
4 years ago
12

Why is food digested?

Biology
2 answers:
nadezda [96]4 years ago
6 0
I think it's e ya I think so
denis-greek [22]4 years ago
3 0
The answer is
E. All of the above
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Where do the ducts of the submandibular salivary glands empty into the oral cavity?
Vera_Pavlovna [14]
The ducts empty the saliva from the submandibular salivary glands into the two sublingual carnicles.

The saliva produces in the salivary glands contains an enzyme named amylase, which is responsible for the chemical breakdown of starch. The saliva also helps to add moisture to the food and make it easier for it to pass through the ailementary canal. Further break down of starch then occurs when amylase is secreted into the small intestines.
6 0
4 years ago
How does genotypic variation occur?
german
Variations in a genotype could be major or minor. It really depends on the degree of change. A genotype changes due to errors mutations. Some are endogenous, occuring with the organismm often during meiosis that causes changes in a genotype.

Learn more about here: https://www.quora.com/What-causes-variation-in-genotypes-How-does-this-occur

3 0
4 years ago
Which step in the PCR program would you have to change if your fragment would have been 10 times longer and how?
bekas [8.4K]

Answer:

increasing extension time

Explanation:

The Polymerase Chain Reaction is a technique widely used in molecular biology laboratories to amplify target DNA regions. The standard steps of a PCR are as follow 1-denaturation, 2-annealing and 3-elongation/extension. These steps are repeated 15-40 times in order to exponentially amplify the linear DNA fragment. It is well known that longer extension times can be used as a strategy to increase the yield of longer PCR products. This is because the extension time depends on the synthesis rate of the DNA polymerase used in PCR technique and the length of the DNA fragment to be amplified.

7 0
3 years ago
What is the approximate percent of oxygen by volume present in Earth's lower atmosphere?
Svetlanka [38]

Answer:  21 percent

Explanation:

According to NASA, the gases in Earth's atmosphere include: Nitrogen — 78 percent. Oxygen — 21 percent. Argon — 0.93 percent.

4 0
3 years ago
What is photosynthesis?
RUDIKE [14]
Plants changing sun energy to food

6 0
4 years ago
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