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  1. Located in thylakoid and is light absorbing pigment; gives plants green color by absorbing violet blue and red light and reflects green light. Stomata. Where CO2 enters and O2 + water vapor leave plants. See more. Unit 1-8 Learn with flashcards, games, and more — for free.

  2. Study with Quizlet and memorize flashcards containing terms like Water characteristics, Surface Tension, Specific Heat and more.

  3. Questions to study for AP Biology Exam Learn with flashcards, games, and more — for free.

  4. Get ready for your AP Biology exam by practicing with unlimited free AP practice tests. Choose the units you want to focus on below. Which subject are you taking?

    • 2: Interpreting and Evaluating Experimental Results with a Graph and Error Bars 9 points
    • 4: Conceptual Analysis 4 points
    • 6: Analyze Data 4 points

    Many types of cancer are treated with a combination of therapies. In lung cancer, some tumors respond well to the drug paclitaxel followed by radiation treatment. Paclitaxel is a chemical that disrupts mitosis. Instead of spindle fibers originating from the two sides (poles) of the cell, paclitaxel-treated cells develop three poles and then divide ...

    Solid tumors are clusters of cancer cells and often contain blood vessels. When molecule B binds to the wild-type Brec protein in the plasma membrane of certain solid tumor cancer cells (Figure 1), the cancer cells express the membrane protein A and sometimes stimulate increased growth of blood vessels into the tumors. Cells with a particular mutat...

    Increasing the efficiency of photosynthesis is one way to increase crop yield and help to feed human populations. One enzyme vital to the Calvin-Benson cycle of photosynthesis is Rubisco. Rubisco catalyzes the fixation of atmospheric CO2 into organic molecules so that the carbon atoms can be used to produce carbohydrates. Rubisco is composed of two...

  5. Free AP Biology Practice Tests. Barron's Practice Test. Barron's offers a free practice test online that has the same format as the current AP test. You can take it in timed or untimed ("practice") mode. If you use practice mode, you can see answer explanations as you go along.

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  7. Questions 1 and 2 are long free-response questions that require about 25 minutes each to answer. Questions 3 through 6 are short free-response questions that require about 10 minutes each to answer. Read each question carefully and completely. Answers must be written out in paragraph form.

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