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  2. Biology - Wikipedia

    en.wikipedia.org/wiki/Biology

    Biology is the scientific study of life. [ 1 ] [ 2 ] [ 3 ] It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. [ 1 ] [ 2 ] [ 3 ] For instance, all organisms are composed of at least one cell that processes hereditary information encoded in genes , which can be transmitted ...

  3. List of secondary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_secondary...

    Often secondary programs are divided into two programs: middle school and high school. Generally, middle school comprises grade 6 (age 11–12), grade 7 (age 12–13), and grade 8 (age 13–14), while high school comprises grade 9 (age 14–15) through grade 12 (age 17–18). Many schools use a variation of the structure; these decisions are ...

  4. Secondary education in the United States - Wikipedia

    en.wikipedia.org/wiki/Secondary_education_in_the...

    These certifications can overlap. In Missouri, for example, middle school certification covers grades 6–8, elementary school certification covers kindergarten to grade 5, and high school certification covers grades 9–12. This reflects the wide range of grade combinations of middle schools, junior high schools, and elementary schools.

  5. Twelfth grade - Wikipedia

    en.wikipedia.org/wiki/Twelfth_grade

    A 12th grade visual arts class in Scott County, Virginia in the United States. Twelfth Grade (also known as 12th Grade, Grade 12, Senior Year, Standard 12, 12th Standard, 12th Class, or Grade of the 12th) is the twelfth and final year of formal or compulsory education. It is typically the final year of secondary school and K–12 in most parts ...

  6. 20 Biology Jokes So Funny, They Cell Themselves

    www.aol.com/20-biology-jokes-funny-cell...

    If LOLs are in your DNA, you’ll love these hilarious biology jokes. The post 20 Biology Jokes So Funny, They Cell Themselves appeared first on Reader's Digest.

  7. List of unsolved problems in biology - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    1 General biology. Toggle General biology subsection. 1.1 Evolution and origins of life. 1.2 Biochemistry and cell biology. ... [10] [11] [12] Determinants of cell size.