Mitotic division in onion root cells:
- Prophase: the emergence of chromatin threads that form chromosomes, the chromosomes are visible and overlap.
- Metaphase: chromosomes line up and line up in the middle of the equatorial plane. The centromere of the chromosome appears to have bonds with the kinetochores connected to the spindle threads.
- Anaphase: the centromere of the chromosome undergoes division then the chromosomes are pulled by the spindle threads towards the two opposite poles and leave the center of the equator that looks empty.
- Telophase: The cytoplasm divides into two identical-looking daughter cells. At the telophase stage, the process of cell division occurs in two parts and has identical properties.
Mitosis is a cell division through the stages of prophase, metaphase, anaphase, and telophase. The purpose of mitosis is for growth and regeneration which results in two daughter cells that are identical to the original parent cell. Mitosis occurs only once and lasts only during somatization.
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Answer: Many of the diseases which cause problems in today's society afflicted Egyptian populations. These include tuberculosis, malaria and schistosomiasis.
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Answer:
Different researchers break the life cycle of humans into different number of stages. The life cycle of the humans can be categorized into:
Pregnancy: During pregnancy, an embryo is formed from a zygote. Then, eventually a fetus is formed.
Infancy: Infancy can be described as the earliest period after a child is born.
Childhood: The age where the child starts to learn from his environment.
Puberty: The beginning of adolescence is known as puberty. It is the time when various hormonal changes occur.
Adolescence: The late teen ages.
Adulthood: The age when the person has passed the teen ages.
Old age: People above the age of fifty.
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