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.
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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.
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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:
Since the images are not available, I can only give the hints to correctly classify the items as a fruit and a vegetable.
a. If it is a fruit, then it will have seeds inside it. Example, the seeds in a citrus lime or a lemon, a watermelon.
b. If it is a vegetable, then it will be any edible part of the plant, like the leaves, stem, roots, or the flower, but not the fruit. Examples are spinach, potato, cauliflower, cabbage, etc.
The mutation was most likely the result of a change in the ability of the DNA replication.
<h3>How mutation occur?</h3>
Mutations result either from errors that occurs in DNA replication or caused by the mutagens, such as chemicals and radiation, which react with DNA and change the structures of individual nucleotides so we can conclude that the mutation was most likely the result of a change in the ability of the DNA replication.
Learn more about mutation here: brainly.com/question/17031191
I haven't done biology in a long time but I am almost certain it is called a acrocentric chromosome.
B. a group of female bottlenose dolphins... because when its sororal it means sister to sister
