Mastering Concepts 8.1 1. Explain the roles of mitotic cell division‚ meiosis‚ and fertilization in the human life cycle. Mitosis allows for growth and repair from the fertilized egg to the adult. In reproductively mature individuals‚ meiosis creates gametes with half the genetic material. The male gamete then fertilizes the female gamete during sexual reproduction‚ forming a zygote with a full set of genetic material. 2. Why are both cell division and apoptosis necessary for the development
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Biology HL Portfolio The Cell and Cell Theory [pic] The cell The word cell comes from the Latin word “cellula”‚ which means a small room. The cell is the smallest unit of a living organism‚ also known as “the building block of life”. Every living organism is consisted of a cell. There are bacteria (unicellular organisms)‚ and multicellular organisms. There are different types of cells‚ prokaryotic and eukaryotic cells. All cells come from preexisting cells. “Every cell is self-maintaining;
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CORE BIOLOGY PRACTICALS You will need to know these practicals as the exam board may ask you questions based on them. Below is a summary of each one. Name of practical and independent & dependent variables Effect of caffeine on Daphnia heart rate Independent: caffeine concentration Dependent: heart rate of Daphnia Measuring the content of Vitamin C in fruit juice Independent: fruit juice Dependent: volume of juice required to decolourise 1cm3 of DCPIP The effect of temperature on cell membranes
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very long; (fungal cells) hyphae roots- not a single unit; protoctista- not specialized to single function; subcellular things like organelles 2.1.2 Discuss the evidence for the cell theory (3). • Robert Hooke first described cells in 1665 while observing cork with a microscope he built. Coined the term “cell” • Antoine van Leeuwenhoek observed the 1st living cells and referred to them as animalcules. “microscope” • In 1838‚ botanist Mathias Schleiden stated that plants are made of independent separate
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highest number of cells in mitosis we did an experiment where we found out cells that are closer to the root tip are more likely to be doing mitosis than the cells that are further away from the root tip. Through the experiment‚ we looked at the zone of cell division‚ which is
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The role of mitosis relates directly to the development of Kaposi Sarcoma. In order for cancer cells to begin to form‚ they must have something go wrong inside of the cell or something that makes things work incorrectly. In the article “Do we know what causes Kaposi Sarcoma?” on cancer.org‚ it states “In KS‚ the cells that line blood and lymphatic vessels (called endothelial cells) are infected with KSHV. The virus brings genes into the cells that can cause the cells to divide too much and to live
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2010 – 2 – 1. N10/4/BIOLO/HPM/ENG/TZ0/XX [Question and image removed for copyright reasons] 2. What is the sequence of stages during the cell cycle? A. B. C. D. G1 mitosis G1 G1 S G1 G2 G2 G2 G2 S mitosis cytokinesis S cytokinesis mitosis cytokinesis S mitosis cytokinesis 8810-6001 – 3 – 3. N10/4/BIOLO/HPM/ENG/TZ0/XX The levels of iron in liver tissue from 12 rats fed on beef and 11 rats fed on plant
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Building Blocks of Life Worksheet Part 1: Mitosis and Meiosis Short-Answer Response Use Ch. 5 of BioInquiry and the “Comparing Mitosis and Meiosis” video as resources for Part 1 of this assignment. Write 75- to 100-word answers to the following questions. • Why are the process of mitosis and meiosis both important to a living organism? Mitosis is very important to living organisms. Mitosis is a process of cell division. Basically‚ mitosis is where the parent cell divides and two genetically
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Material Appendix C The Building Blocks of Life Worksheet Part 1: Mitosis and Meiosis Short-Answer Response Use Ch. 5 of BioInquiry and the “Comparing Mitosis and Meiosis” video as resources for Part 1 of this assignment. Write 75- to 100-word answers to the following questions. Why are the process of mitosis and meiosis both important to a living organism? Mitosis and meiosis are important‚ because mitosis is a type of sexual reproduction which enables a cell to reproduce two new
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Virtual Lab 1: Virtual Microscopy A. Estimate the size (length and width) of these microscopic objects in micrometers (microns): 1. An E. Coli cell. 3x 0.6 μm = 1.8 μm 2 A mitochondrion. 4x 0.8 μm = 3.2 μm 3. A Red blood cell. 8 μm 4. A virus. 220 nm = 0.00022 μm 5. A water molecule. 275 pm = 0.000275 μm B. 1 Describe three differences between prokaryotic and eukaryotic cells. The three differences between prokaryotic and eukaryotic cells are: Eukaryotic cells contain a nucleus inside
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