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  2. National Parkway - Wikipedia

    en.wikipedia.org/wiki/National_Parkway

    A National Parkway is a designation for a protected area in the United States given to scenic roadways with a protected corridor of surrounding parkland. National Parkways often connect cultural or historic sites. [1] The U.S. National Park Service manages the parkways.

  3. AP Environmental Science - Wikipedia

    en.wikipedia.org/wiki/AP_Environmental_Science

    Advanced Placement (AP) Environmental Science (also known as APES, AP Enviro, AP Environmental, AP Environment, or AP EnviroSci) is a course and exam offered by the American College Board as part of the Advanced Placement Program to high school students interested in the environmental and natural sciences. AP Environmental Science was first ...

  4. Ced-9 - Wikipedia

    en.wikipedia.org/wiki/Ced-9

    CED-9 encodes the apoptosis regulator CED-9 protein which is an important negative regulator protein in the apoptosis pathway of C. elegans. [9] The protein consists of 280 amino acids and has a molecular weight of 31824.42 Da. [ 10 ] The structure of this protein has been solved using X-ray diffraction revealing 9 Helices , 2 Beta strands ...

  5. List of national parks of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_national_parks_of...

    The United States has 63 national parks, which are congressionally designated protected areas operated by the National Park Service, an agency of the Department of the Interior. [1] National parks are designated for their natural beauty, unique geological features, diverse ecosystems, and recreational opportunities, typically "because of some ...

  6. Advanced Placement - Wikipedia

    en.wikipedia.org/wiki/Advanced_Placement

    One 2014 study of math and science AP courses showed that participation rates were 52.7% for AP Chemistry, 53.6% for AP Physics, 57.7% for AP Biology, and 77.4% for AP Calculus. [67] A 2017 study found similar participation rates (49.5% for AP Chemistry, 52.3% for AP Physics, 54.5% for Biology, and 68.9% for Calculus).

  7. Advanced Placement exams - Wikipedia

    en.wikipedia.org/wiki/Advanced_Placement_exams

    Advanced Placement (AP) examinations are exams offered in United States by the College Board and are taken each May by students. The tests are the culmination of year-long Advanced Placement (AP) courses, which are typically offered at the high school level. AP exams (with few exceptions [1]) have a multiple-choice section and a free-response ...

  8. Conservation in the United States - Wikipedia

    en.wikipedia.org/wiki/Conservation_in_the_United...

    America had its own conservation movement in the 19th century, most often characterized by George Perkins Marsh, author of Man and Nature.The expedition into northwest Wyoming in 1871 led by F. V. Hayden and accompanied by photographer William Henry Jackson provided the imagery needed to substantiate rumors about the grandeur of the Yellowstone region, and resulted in the creation of ...

  9. Foothills Parkway - Wikipedia

    en.wikipedia.org/wiki/Foothills_Parkway

    The Foothills Parkway is a national parkway which traverses the foothills of the northern Great Smoky Mountains in East Tennessee, located in the southeastern United States. The 72.1-mile (114 km) parkway will connect U.S. Route 129 (U.S. 129) along the Little Tennessee River in the west with Interstate 40 (I-40) along the Pigeon River in the east.