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Biology

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Biology Review (Chapters 1 - 4)

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Chapter 1 Common Characteristics of Life  composed of cells  highly organized  exchanges energy with the environment  responds to stimuli  reproduces itself  evolves over time  adapts to environment  maintains homeostasis 7 characteristics common to life 1. Cells and organization: organisms maintain an internal order – simplest is the cell 2. Energy use and metabolism: to maintain internal order, energy is needed. Energy is utilized in chemical reactions collectively known as metabolism 3. Response to environmental changes: organisms react to environmental changes to increase chances of survival 4. Regulation and homeostasis: organisms regulate cells and body to maintain homeostasis – relatively stable internal conditions

Biology AP Vocabulary Campbell 7th Edition

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Campbell 7th Edition Biology AP Vocabulary


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AP Biology

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Steps of the scientific process Observation Hypothesis Prediction Experiment Analyzing data/ draw conclusions Communicating results Hypothesis is the then statement while prediction is the if statement. If the tomato plants receive water with carbonation then they will grow more in height. Independent variable-answer the question "What do I change?" Dependent Variable-"What do I observe?" Inference
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evolution of a platypus

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Sean Kosowsky 10/14/10 Mrs. Crowning AP BIO Platapu-what? Objective: The objective of this lab is to construct a general phylogenetic tree for the evolutionary history of a platypus. By using the NCBI we will learn how closely related certain species are to the platypus. We will use this information to find the platypus? likely ancestors. This evolutionary history will help show why the platypus evolved to be the way that it is. Hypothesis: I think that the platypus has a very varied evolutionary history. It could have come from any of several ancestors. There are several distinct characteristics that must be considered before you can make a conclusion about the evolutionary history of the platypus: The platypus is one of five living species of monotremes.

Moss and Ferns

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Both moss and sperm use many of the same structures in their reproduction such as sporangium, antheridium, and archegonium. Water is necessary for fertilization to occur in both of them. Both undergo mitosis and meiosis. Both also go from diploid to haploid in their cycles. But, in moss reproduction, the leafy gametophyte is photosynthetic while the smaller sporophyte is not and in fern reproduction, both the gametophyte and sporophyte are photosynthetic and can live independently. Ferns are primarily homosporous while mosses can be either homosporous or heterosporous. For both, the sperm is motile. Also, the approximate number of generation for moss is 12-13 while for ferns it is 365.

Lab #4 Plant Pigments and Photosynthesis - Questions

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Lab #4 Plant Pigments and Photosynthesis Exercise 4A: Plant Pigment Chromatography Topics of Discussion 1) What factors are involved in the separation of the pigments? 2) Would you expect the Rf value of a pigment to be the same if a different solvent were used? Explain. 3) What type of chlorophyll does the reaction center contain? What are the roles of the other pigments? Exercise 4B: Photosynthesis / The Light Reaction Topics of Discussion 1) What is the function of DPIP in this experiment? 2) What molecule found in chloroplasts does DPIP ?replace? in this experiment? 3) What is the source of the electrons that will reduce DPIP? 4) What was measured with the spectrophotometer in this experiment? 5) What is the effect of darkness on the reduction of DPIP? Explain.

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