Process of Mitosis and Meiosis

                     Process of Mitosis and Meiosis

Meiosis is a system in which a single cell divides into four cells that hold half the original amount of genetic material twice. These cells are our sex cells-male sperm, female eggs. Only half the number of chromosomes are in these four daughter cells. They're haploid from the parent cell.

Mitosis is a type of cell division where one cell (mother cell) divides into two cells (daughter cells) that are genetically identical. Mitosis replaces worn-out cells with new cells within the human body. Mitosis can be divided into five essential phases: interphase, prophase, metaphase, anaphase, and telophase.

A Guide to Natural Selection and Evolution

       How do organisms evolve through natural   
                  selection? (and their examples)
Natural selection results in evolutionary change when individuals with certain traits have a higher survival or reproductive rate in a group than other individuals and pass these inheritable genetic features on to their offspring. 

You may be wondering what type of organisms evolve through such a process, well here are some examples of this: 

• The chaparral biome and the plants that live there; since the chaparral biome is common to catch fire, some plants over time gained the trait to be fire-resistant. 

• Bears and the temperate rainforest; since the forest gets very cold during the winter and food becomes scarce, the bears have evolved to hibernate. They store body fat by consuming lots of food before the winter. They later find a warm place to stay and sleep. This keeps them from freezing to death. 

• Shrimp go through this process as well. Many crabs and shrimp live underground where there is no sun and there is not much good in the sense of vision. They went blind as a result, relying on smell and touch to reach the depths of the cavern.

• Owls are also organisms that go through natural selection. The gray owls are dwindling and the brown birds are thriving, better suited to mix in the bare brown forest trees. As more black owls live, generations pass on more brown genes.

• A hybrid mouse with a genetic mutation that is very beneficial and gives it a leg over its rodent relatives. Generally hybrid organisms can not reproduce, but sometimes there is the occasional hybrid that has just about the right novel mixture of genomes from two species, which makes them, at least temporarily, superior to the pure species.