What factors are considered to determine if something is moving?

1 answer:

8 0

An object is in motion if its distance relative to another object is changing. To tell if an object is moving, you use a reference point. If an object's distance from another object [reference point] is changing. A place or object used for comparison to determine if something is in motion.

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Which cellular process is the main contributor to genetic variation?

Gwar [14]

Answer:

D asexual reproduction

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A frameshift mutation that occurs very early in a protein sequence would have what effect on the protein's structure? see sectio

ExtremeBDS [4]

I think a frameshift mutation that occurs very early in a protein sequence would have an effect on the structure of the protein such that the primary, secondary, and tertiary structures would be altered. A frameshift mutation occurs when a protein is drastically altered because of an insertion or a deletion. Insertions and deletions cause a change in the length of a gene, which causes a shift in the codon reading frame.

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What are the smallest blood cells in the frog?

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Answer:

Unlike typical mammalian red blood cells, those from amphibians, such as frogs, contain a DNA-bearing nucleus that is visible in the center of the cell. The circulatory system of amphibians is rather unusual, their hearts having three chambers, two atria, and a single ventricle.

NegativePositive

Positive

The design of the amphibian circulatory system is curious because blood accumulates oxygen in the lungs and is then returned to the heart before being pumped into the rest of the circulatory system. Therefore, a mixing between oxygenated and deoxygenated blood occurs as blood returning to the heart from the lungs is mixed with incoming blood from the body. Frogs handle this situation by having a very slow metabolism and by absorbing some oxygen through their skin. In addition, the ventricle does have some directional control over the distribution of the blood.

Negative

The presence of a nucleus in amphibian red blood cells allows researchers easy access to large quantities of amphibian DNA. Frog blood has both a solid and a liquid portion. The liquid plasma carries solid elements such as red and white blood cells. Blood can be collected from frogs and the red blood cells isolated by centrifugation. After removal of the residual plasma, purified cells can be treated with specific enzymes and detergents to digest the cellular envelope and release DNA from its protein complex. The DNA is then useful for scientific studies and experiments.

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Explanation:

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3 years ago

What is the function of negative regulator ( tumor suppressor) genes ?

ryzh [129]

Answer:

D To prevent uncontrolled cell growth

Explanation:

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What is the possible consequences of adding an organism to a food chain?

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If an invasive species is added into a food chain/web, it becomes overpopulated/a pest because it has no natural predators.

It can also disrupt the food chain/web by eating the food supplies of the native organism leading to competitions.

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