STANDARD GRADE BIOLOGY CREDIT LEVEL REVISION QUESTIONS INVESTIGATING CELLS 1. In an investigation‚ three 25 g samples of sultanas were put into separate beakers of distilled water‚ as shown below: After 24 hours‚ the sultanas were removed from the water‚ blotted on filter paper and reweighed. The results are shown in the table: |Sample |Mass after 24 hrs (g) |Percentage change in mass | |1
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Exercise 13 MITOSIS: REPLICATION OF EUKARYOTIC CELLS ANSWERS TO QUESTIONS 1. a. Mitosis and cytokinesis are often referred to collectively as "cellular division." Why are they more accurately called cellular replication? The result of mitosis is production of two cells (replicates) identical to the parent cell. The genetic material is replicated rather than divided. b. Does the cell cycle have a beginning and an end? The organization of our study of cellular events indicates a beginning and
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This file includes SCI 230 Evolution Assignment General Questions - General General Questions Resource: “The Origin of Species” section in Ch. 14 of Campbell Essential Biology With Physiology Choose a species to research. Create a 7- to 10-slide Microsoft® PowerPoint® presentation about your chosen species. Include the following in your presentation: · How may your species have evolved? · Describe the mechanism of speciation‚ in general‚ and apply the mechanism
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Question: How does mitosis produce new cells‚ and how is mitosis the same and different? Materials: - Compound microscope - Alliums root slide - Whitefish embryo slide - Power supply Procedure: Refer to page 48 and 49 in the textbook. Results: See attached sheet for drawings of my results. Discussion: Analyze and interpret question 1 and 2 on page 49. 1. The cells in the root tip region of the alliums differ quite a bit from the cells that are found deeper in the root
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SCI/230 Food Web Diagram Food Web Diagram: The Everglades By: Ashley Earp Due: Sunday May 12 Class: SCI/230 Instructor: Ethel Garcia SCI/230 Food Web Diagram Food Web Diagram of the Everglades. |-------------------------------- Alligators/Anaconda/Pythons(C)--------------------------------| /
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SCI 230 Week 1 Checkpoint Theories of Biology.doc The Major Theories of Biology Evolution by natural selection: This theory came about as a result of Charles Darwin trying to find an explanation for “why there are so many different living beings on earth?” (Pruitt‚ N. L.‚ & Underwood‚ L. S. (2006). His theory contains two parts‚ the first part states that species change over generations. The second part states that what causes this change is natural
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Associate Program Material DNA Worksheet Answer the following in at least 100 words: 1. Describe the structure of DNA. DNA stands for Deoxyribonucleic acid and looks like a spiral. The spiral is also known as a double helix. The strands are made up of our genetic information‚ composed of genes and chromosomes. There are four bases divided among purines and pyrimidines. On the purines there are Adenine (A) and Guanine (G). On the pyrimidines there are Cytosine (C) and Thymine (T). The
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The four parts types of nucleotides adenine‚ thymine‚ guanine‚ and cytosine and they each have slightly different shape. Each of this contain three different types of materials a sugar‚ a phosphate‚ and a base. A and T pair together to form a DNA molecule and G and C together form a DNA molecule. The shape that Rosalind images were was a spiral shape. DNA unites all organisms’ means that DNA is the main source in the cell and has the most important job‚ therefore uniting the cells. The DNA of all
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Cell Growth and Reproduction Study Guide The Cell Cycle Study Guide Vocabulary – Cell Cycle‚ Mitosis‚ Cytokinesis 1. How did the G1 and G2 stages get their names? 2. Cells must pass through a critical checkpoint during which two stages of the cell cycle? 3. Where does DNA synthesis happen in eukaryotic cells? 4. What two processes make up the M stage? 5. Among different types of cells‚ which stage of the cell cycle varies most in length? 6. Why does a skin cell divide
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It is important that cells go through mitosis because it makes each new cell contain the same gentic information. If meiosis did not occur the reproduction would cease to exist. Mitosis is the process of chromosomes dividing. There are four steps that it goes through. Between cell division the cells are in interphase. During this there is cell growth and the genetic material such as DNA is contained in the chromosomes‚ duplicated so that when the cell divides each new cell has a full version of
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