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2. Cell cycle checkpoint - Wikipedia

   en.wikipedia.org/wiki/Cell_cycle_checkpoint

   In eukaryotes, the cell cycle consists of four main stages: G 1, during which a cell is metabolically active and continuously grows; S phase, during which DNA replication takes place; G 2, during which cell growth continues and the cell synthesizes various proteins in preparation for division; and the M phase, during which the duplicated ...

3. Cell division - Wikipedia

   en.wikipedia.org/wiki/Cell_division

   Mitotic cell division enables sexually reproducing organisms to develop from the one-celled zygote, which itself is produced by fusion of two gametes, each having been produced by meiotic cell division. [5] [6] After growth from the zygote to the adult, cell division by mitosis allows for continual construction and repair of the organism. [7]

4. Seventh grade - Wikipedia

   en.wikipedia.org/wiki/Seventh_grade

   Seventh grade (also 7th Grade or Grade 7) is the seventh year of formal or compulsory education. The seventh grade is typically the first or second year of middle school. In the United States, kids in seventh grade are usually around 12–13 years old. Different terms and numbers are used in other parts of the world.

5. Cell cycle - Wikipedia

   en.wikipedia.org/wiki/Cell_cycle

   The eukaryotic cell cycle consists of four distinct phases: G 1 phase, S phase (synthesis), G 2 phase (collectively known as interphase) and M phase (mitosis and cytokinesis). M phase is itself composed of two tightly coupled processes: mitosis, in which the cell's nucleus divides, and cytokinesis, in which the cell's cytoplasm and cell membrane divides forming two daughter cells.

6. Her daughter's suicide shocked the community. Now, she's ...

   www.aol.com/her-daughters-suicide-shocked...

   So, when the Washington, D.C. math teacher heard her daughter's alarm clock continue to ring one morning, she didn't think anything of it. ... Crisis Text Line provides free, 24/7, ...

7. Cell biology - Wikipedia

   en.wikipedia.org/wiki/Cell_biology

   Cell biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. [1] [2] All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. [3] Cell biology is the study of the structural and functional ...