Study guides, Class notes & Summaries

In 1928, __________ was surprised to find that when he killed pathogenic bacteria, then mixed the bacterial remains with living harmless bacteria, some living bacterial cells became pathogenic. Frederick Griffith In 1952, ___________ used bacteriophages to show that DNA is the genetic material of T2, a virus that infects the bacterium Escherichia coli (E. coli). Hershey-Chase __________ are viruses that infect bacterial cells. Bacteriophages ______ discovered the relationships between D...

What is not a part of the Cell Theory The molecules within a cell are alive the process that converts DNA to mRNA Transcription The process that converts mRNA to protein Translation The four cells produced in meiosis will have a n number of chromosomes and will differ genetically from each other what are the reactants of photosynthesis Carbon Dioxide, water and sunlight which scientists influenced Darwin by his study of human population growth and the resulting struggle for resources? Tho...

What is homeostasis the process whereby living organisms regulate their cells and bodies to maintain relatively stable internal conditions What are the characteristics of living things 1. Cells and Organization 2. Energy use and metabolism 3. Response to environmental changes 4. Regulation and homeostasis 5. Growth and Development 6. Reproduction 7. Biological Evolution atom the smallest component of an element having the chemical properties of the element molecule Two or more atoms he...

Why is oil immersion used? To reduce the amount of light rays that are refracted away from the objective lens. It increases numerical aperture and maintains a uniform light speed. increase the resolving power of a microscope. Prevents refraction of light. What parts of the microscope does light travel through? Illuminator-The light source for the microscope.Diaphragm-Controls the amount of light entering the condenser. Condenser lensFocuses light through the specimen. How do you calculate t...

gregor mendel father of modern genetics two things gregor mendel discussed character trait character heritable feature of an organism trait version of a character what did mendel follow? the inheritance of traits in true-breeding pea plants cross mating between traits ex: purple flower with a white flower hybrid offspring of a crossphenotype physical appearance ex: purple flower color genotype DNA content of genes when mendel crossed the white (recessive) pea plant with the purple (do...

Metabolism Sum of all chemical activity Catabolic pathway break down molecules anabolic pathway build more complex molecules bioenergetics study of how organisms manage their energy resources Energy The capacity to do work or cause change. Potential Energy Energy by position or state. Examples - Water held back by a dam, chemical energy and electrical energy in a battery. Kinetic Energy Energy in motion or at work. EX: moving water, energy released by breaking a chemical bond or electri...

autotrophs an organism able to build all the complex organic molecules that it requires as its own food source heterotroph an organism that cannot derive energy from photosynthesis or inorganic chemicals , and so must feed on other plants and animals, obtaining chemical energy by degrading their organic molecules cellular respiration the oxidation of organic compounds to extract energy from chemical bonds dehydrogenation chemical reaction that involves the loss of a hydrogen atom, electro...

Autotrophs include what? Plants The raw materials used for Photosynthesis include what? CO2 and H2O Products and by-products of photosynthesis do NOT include what? CO2 (includes O2, C6H12O6, and H2O) A thin layer of chromatogram is useful for what? Separating pigments based on their physical characteristics What pigments would you find in a typical leaf? Chlorophyll A, Chlorophyll B, and carotenoids Most plants store carbohydrates in the form of... Starch Organisms capable of producing ...

What defines living organisms separate from non-living things? Living things are made up of basic units called cells, are based on a universal genetic code, obtain and use materials and energy, grow and develop, reproduce, respond to their environment, maintain a stable internal environment, and change over time Discuss the scientific method and its use in acquiring knowledge. Involves observing and asking questions, making inferences and forming hypotheses, conducting controlled experiment...

Cell Cycle An ordered sequence of events in the life of a cell Mitosis A process of nuclear division in eukaryotic cells conventionally divided into five stages: prophase, prometaphase, metaphase, anaphase, and telophase. Mitosis conserves chromosome number by allocating replicated chromosomes equally to each of the daughter nuclei. What are the four stages of mitosis? Prophase Metaphase Anaphase Telophase Prophase The first stage of mitosis, in which the chromatin condenses into discre...