Diploid cells. Meiosis is the process of cell division by
which involving gametes. Cell division is just the same for sperm and egg
cells, but they have distinguishable descriptions and labels in the process. Spermatogenesis
is for the males’ sperm cells and oogenesis is the process for females’ egg
cells. The cell division of meiosis involves the two phases, respectively
meiosis I and meiosis II. Meiosis I like mitosis is the cell division that
produces diploid cells. These diploid cells are cells that contain a complete
pair of chromosomes which is 46. The result is two diploid cells after the
first meiosis. To provide clear explanation, in contrast haploid cells only
contain 23 chromosomes and are created after meiosis II which is 4 in number.
Answer:
a gradual increase in the overall temperature of the earth's atmosphere because of the greenhouse effect caused by increased levels of pollutants.
Explanation:
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This is false. The nucleus of a cell stores the DNA and controls the cell’s action, but chromatin is the protein in the nucleus that folds DNA into tiny packages.
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:
