Answer:
The testes produce spermatocytes (sperm) while ovaries produce oocytes (ova)
Explanation:
They are produced by the process of meiosis I on the parent cell than meiosis II. In the testes, the process is called spermatogenesis while in ovaries the process is referred as oogenesis. These processes are regulated by gonadotropins Follicle Stimulating Hormone and Luteinizing Hormone.
Fractional distillation is the process in which the alkanes in petroleum can be partly separated. This is due to the petroleum having different boiling points. The process starts off with the heating of crude oil for it to vaporize. The vaporized crude oil is then fed into the bottom of the distillation tower. The resulting vapor rises through a vertical column. As the gases rises through the distillation tower, its temperature decreases. Thus, certain hydrocarbons begin to condense and run off at varying levels. Each level-specific condensed fraction contains hydrocarbon molecules that has a similar number of carbon atoms. These "cuts" of boiling point allow numerous hydrocarbons to be separated out in a single process. The cooling of the tower height allows for the separation. Subsequent to the refinement, individual fuels may undergo more refinement to remove existing contaminants or substances so as to improve the quality of the fuel through cracking.
Answer:
During mitosis, the nucleus divides. Mitosis is followed by cytokinesis, when the cytoplasm divides, resulting in two cells. After cytokinesis, cell division is complete. Scientists say that one parent cell, or the dividing cell, forms two genetically identical daughter cells, or the cells that divide from the parent cell. The term "genetically identical" means that each cell has an identical set of DNA, and this DNA is also identical to that of the parent cell. If the cell cycle is not carefully controlled, it can cause a disease called cancer, which causes cell division to happen too fast. A tumor can result from this kind of growth.
During mitosis, the two sister chromatids must be split apart. Each resulting chromosome is made of 1/2 of the "X". Through this process, each daughter cell receives one copy of each chromosome. Mitosis is divided into four phases:
Prophase: The chromosomes "condense," or become so tightly wound that you can see them under a microscope. The wall around the nucleus, called the nuclear envelope, disappears. Spindles also form and attach to chromosomes to help them move.
Metaphase: The chromosomes line up in the center of the cell. The chromosomes line up in a row, one on top of the next.
Anaphase: The two sister chromatids of each chromosome separate, resulting in two sets of identical chromosomes.
Telophase: The spindle dissolves and nuclear envelopes form around the chromosomes in both cells.
