Q1 General Biology 12 Module 1 PDF

Senior High School General Biology 1 Quarter 1 – Module 1: Cell: Basic Unit of Life General Biology 1 – Grade 12 (SHS STEM) Quarter 1 – Module 1: Cell: The basic Unit of Life First Edition, 2021 Republic Act 8293, section 176 states that: No copyright shall subsist in...

Senior High School General Biology 1 Quarter 1 – Module 1: Cell: Basic Unit of Life General Biology 1 – Grade 12 (SHS STEM) Quarter 1 – Module 1: Cell: The basic Unit of Life First Edition, 2021 Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties. Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them. Published by the Department of Education – Region XI Regional Director: Allan G. Farnazo, Director IV Assistant Regional Director: Maria Ines C. Asuncion, EdD, CESO V Development Team of the Module Writer: Jodison A. Tanutan Editor: Reviewer: Illustrator: Frances Jay V. Berame Layout Artist: Template Developer: Neil Edward D. Diaz Management Team: Reynaldo M. Guillena Jinky B. Firman Marilyn V. Deduyo Alma C. Cifra Aris B. Juanillo Faye Genevieve P. Pasamonte Printed in the Philippines by __________________________________________ Department of Education – Division of Davao City Office Address: E. Quirino Avenue, Davao City Telephone: (082) 227 4762 E-mail Address: [email protected]  Senior High School General Biology 1 Quarter 1 – Module 1: Cell: The Basic Unit of Life Introductory Message For the facilitator: As a facilitator, you are expected to orient the learners on how to use this module. You also need to keep track of the learners' progress while allowing them to manage their own learning at home. Furthermore, you are expected to encourage and assist the learners as they do the tasks included in the module. For the learner: As a learner, you must learn to become responsible of your own learning. Take time to read, understand, and perform the different activities in the module. As you go through the different activities of this module be reminded of the following: 1. Use the module with care. Do not put unnecessary mark/s on any part of the module. Use a separate sheet of paper in answering the exercises. 2. Don’t forget to answer Let Us Try before moving on to the other activities. 3. Read the instructions carefully before doing each task. 4. Observe honesty and integrity in doing the tasks and checking your answers. 5. Finish the task at hand before proceeding to the next. 6. Return this module to your teacher/facilitator once you are done. If you encounter any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator. Always bear in mind that you are not alone. We hope that through this material, you will experience meaningful learning and gain deep understanding of the relevant competencies. You can do it! 2  Let Us Learn This module was designed for you, the learners. It is to facilitate you to learn the appropriate knowledge and skills as you go through a series of worthwhile activities. The lessons are arranged sequentially in this course to ease understanding and mastery. This module will help you in your learning the key concepts on topics and immersed you in various activities, and hands – on tasks that will help you answer the questions pertaining to the cell theory, structure and functions. This module has three (3) lessons: Lesson 1 – the Cell and the Cell Theory Lesson 2- Cell Structure and Functions Lesson 3- Prokaryotic vs Eukaryotic Cells After going through this module, you are expected to: 1. Explain the postulates of the Cell Theory (STEM_BIO11/12-Ia-c-1 2. Describe the structure and function of major and subcellular organelles (STEM_BIO11/12-Ia-c-2). 3. Distinguish prokaryotic and eukaryotic cells according to their distinguishing features (STEM_BIO11/12-Ia-c-3). Let Us Try! Read each item carefully. Select the best answer and write only the letter of your choice on a separate piece of paper. 1. Living organisms are hierarchically classified into levels of biological organization. Which biological level of organization is the smallest unit known that can perform all the life processes. A. Cell C. System B. Organ D. Tissue 2. Which of the following is NOT a postulate of a unified cell theory? A. Cells are the basic unit of life B. All new cells arise from existing cells C. All living things are composed of cells D. All cells undergo complete development 3. Who is the scientist who coined the term cell for the box like structure he observed when viewing cork tissue? A. Matthias Schleiden C. Rudolf Virchow B. Robert Hooke D. Theodor Schwann 4. It contain the cell’s hereditary information and controls the cell’s growth and reproduction. Which of the following cellular structure is called as the control center. A. Cell Membrane C. Nucleolus B. Nucleus D. Organelle 5. This organelle plays a major role in breaking down nutrients and generating energy-rich molecules for the cell. Which of the following organelles serves as venue for cellular respiration and is known as the powerhouse of the cell? A. Chromosome C. Nucleus B. Mitochondrion D. Nucleolus 6. When you look at an unknown cell under the microscope, you noticed the presence of a cell wall and membrane-bound organelles. What kind of cell you can conclude? A. animal cell C. plant cell B. bacterial cell D. virus 7. Endomembrane system is composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell. Which of the following is not considered as part endomembrane system. A. endoplasmic reticulum C. peroxisome B. golgi apparatus D. vesicles 8. Detoxification is a built-in defense mechanism required to handle the end products of cellular respiration and metabolic reactions from toxins. Which of the organelle involved in the detoxification of alcohol? A. endoplasmic reticulum C. peroxisome B. lysosome D. ribosome 9. When there is an abnormal shape in the human nerve, there is a defect in which of the following cell parts? A. cell wall C. nucleus B. cytoskeleton D. ribosome 10. Which of the following property that distinguishes cells in domain Bacteria from those in domain Eukarya? A. cell wall C. flagella B. DNA D. membranous organelles 11. Which of the following statements best describes the difference between prokaryotes and eukaryotes? I. Prokaryotes do not have membrane –bound organelles that eukaryotes have II. Prokaryotes have cell walls while eukaryotes have none. III. Prokaryotes are unicellular while eukaryotes are multicellular A. I only C. III only B. II only D. I and II only 12. Which of the following structures is NOT found in prokaryotes but present in eukaryotes? A. cell membrane C. DNA B. Cell Wall D. nuclear membrane 13. Some prokaryotes such as cyanobacteria can photosynthesize. How do they differ from photosynthetic eukaryotes such as green algae? A. They have no cell wall B. They have no chlorophyll C. They live in freshwater, not seawater D. They have chlorophyll but no chloroplast. 14. The following activities are performed by both unicellular and multicellular organisms EXCEPT one. Which is performed only by multicellular organism? A. Each cell reproduces and grows B. The cell goes through the cell cycle C. The cell reproduces sexually or asexually D. Each kind of cell specializes in a specific function. 15. What makes unicellular organisms different from multicellular organism? A. The cells have direct relationship with other cells B. The cells perform metabolic activities C. They are made up of a single cell D. They are complete organisms Lesson 1 The Cell Theory Let Us Study In your previous grade levels, you have learned about the characteristics of a cell – its parts and the functions of each part. In this lesson, we will learn how cells were first discovered, how the cell theory was developed, and the main components of the cell theory. To enhance learning, you will be doing activities around cell theory for deeper understanding of this lesson. Anton Van Leeuwenhoek, a Dutch shopkeeper, discovered the microscope in the 1600. This paved way to the discovery of bacteria and protozoa. In his experiments, he observed the box – like structures when viewing cork tissue through his lens, in which he coined the term “cell”. Developments in 17 th century in the field of microscopy and staining techniques enabled other scientist to view some components inside the cells. The unified theory was proposed by botanist Matthias Schleiden and zoologist Theodor Schwann who were both studying tissues in the late 1930’s. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory. Later, spontaneous generation as a method for cell origination – abiogenesis was proposed by Schleiden and Schwann but was disproven. Furthermore, Rudolf Virchow proposed that - “All cells only arise from pre-existing cells”. These observations made by Hooke, Leeuwenhoek, Schleiden, Schwann, Virchow, and others made an important hallmark for the development of the cell theory. The cell theory is a widely accepted explanation of the relationship between cells and living things. The cell theory states: (1) All living things or organisms are made of cells; (2) New cells are created by old cells dividing into two; and (3) Cells are the basic building units of life. The cell theory proves that cells are common to all living things and the best source of information about life. And because cells come from other cell, it is possible for scientists to study growth and reproduction and all other functions of living things. THE THREE POSTULATES OF THE CELL THEORY 1. The cell is the basic unit of life. All living things are made up of cells. Cell is the smallest unit of living things and the smallest part of the organism that retains characteristics of the entire organism. For example, a cell can take in fuel, convert it to energy, and eliminate metabolic wastes, just like the organism as a whole can. The structures inside the cell cannot perform these functions on their own, so the cell is considered the lowest level. 2. All living things are made up of one or more cells. A living thing, whether made of one cell (like bacteria) or many cells (like a human), is called an organism. Several cells of one kind that interconnect with each other and perform a shared function form tissue; several tissues combine to form an organ (your stomach, heart, or brain); and several organs make up an organ system (such as the digestive system, circulatory system, or nervous system). Several systems that function together form an organism (like a human being). 3. All cells come from pre-existing cells (omni cellulae e cellula). In the mid-1800s, the long-standing myth which claims the "spontaneous generation" of life from inanimate matter was dispelled. This happened when Rudolf Virchow observed that cells divide to produce more cells. It became clear that all life must arise from pre-existing life — via a process of reproduction. If cells are the fundamental units of life, they too must have a reproductive mechanism that maintains the proper chromosome number in each cell.  Let Us Practice Activity 1. Going Back in Time Direction: Read the storyboard below and complete the graphic organizer. Source: https://www.storyboardthat.com/fr/storyboards/s162169/bio-comic-strip In this graphic organizer, (1) indicate the contribution of each scientist in their respective box, (2) state the three postulates of the Cell Theory, and (3) explain how the invention of the compound microscope contributed to the development of the Cell Theory.  Robert Anton van What are the main points of the Cell Leeuwenhoe Hooke k Theory? 1. 2. 3. 16 16 How did the 1838 1839 1855 invention of the microscope Matthias Theodor Rudolf contribute to the Schleide Schwan Virchow formation of the n n Cell Theory? Let Us Practice More Activity 2. Cell Comics Direction: Read the text below. Choose one new tenet from the Modern Cell Theory (e.g. Energy flows within cells.) and create a short comic strip illustrating and explaining the chosen tenet. The comics can be funny, but must also be clear, accurate, and explanatory in nature. All three postulates of the Cell Theory are equally important – the postulates support the theory that the functions necessary for life occur in the cell. Findings since the time of the original Cell Theory have enabled scientists to "modernize" the theory, including points related to biochemistry and molecular biology. The modern version of the Cell Theory includes: All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms. The activity of an organism depends on the total activity of independent cells. Energy flow (metabolism and biochemistry) occurs within cells. Cells contain hereditary information (DNA) which is passed from cell to cell during cell division. All cells are basically the same in chemical composition in organisms of similar species. The Cell Theory is one of the main principles of biology. The points of the theory have been found to be true for all life. It has withstood intense examination of cells by modern powerful microscopes and other instruments. Note: You may use the template below or use a storyboard creator online in making your comic strips Your comic strip will be rated based on the rubric below. Please be guided accordingly. Comic Strip Rubrics CATEGORY 10 Points 9-8 Points 7-6 Points 5 Points Excellent Good Satisfactory Needs Improvement Required Comic Strip Comic Strip Comic Strip One or more Elements includes all includes all includes all required required required required elements is elements as elements and elements. missing from well as a few one additional the comic strip. additional element. elements.  Content - All facts in the 99-90% of the 89-80% of the Fewer than Accuracy comic are facts in the facts in the 80% of the conceptually comic are comic are facts in the accurate. conceptually conceptually comic are accurate. accurate. conceptually accurate. Clarity/ Comic Strip is Comic Strip is Comic Strip is Organization of Neatness/ easy to read, easy to read, somewhat easy material is Organization and all and most to read, and confusing to elements are elements are some elements the reader. clearly written clearly written are clearly Comic Strip is and drawn. All and drawn. written and hard to read, information is Most drawn. Some and few organized information is information is elements are appropriately. organized organized clearly written appropriately. appropriately. and drawn. Let Us Remember In Lesson 1, you have learned the following important concepts. The postulates of the original Cell Theory are the following: A component of the cell theory is that all living things are composed of one or more cells. A component of the cell theory is that the cell is the basic unit of life. A component of the cell theory is that all cells come from pre-existing cells. Lesson Cell Structure and 2 Functions Let Us Study Learned in our Biology class that an organelle is a membrane bound structure found within a cell and they make up the subunits of the cell. In this lesson, we will scrutinize what is inside a cell. We will describe the structures of the organelles and subcellular organelles and how they function. We will also identify whether such organelle is found in plants or animals.  Plant Cell Animal Cell An organelle is a cell’s internal organ – they can be found within the cell. Imagine that the organelles are the smaller offices/rooms within the factory, which has specialized ability to help other offices/rooms within the factory, helping in the carrying out of specific task or function. These organelles are in the cytoplasm – a viscous liquid found within the cell membrane where organelles can be found and where most actions in the cell happened. Below is a table of organelles, their description, function, and classification. Organelle Description Function Animal, Illustration Plant or Both Rigid, tough, Protects and Plant made of supports the 1. CELL WALL cellulose cell Jelly like Pads and Both substance supports 2. CYTOPLASM that contains organelles organelles inside the cell.  Dense, ball Controls all of Both shaped the cell’s 3. NUCLEUS structure, activities contains DNA Clear, tubular Transports Both system of materials like 4. ENDOPLASMIC tunnels proteins RETICULUM throughout around the the cell cell Small specks Makes Both made of RNA. proteins 5. RIBOSOME Found in cytoplasm or on the endoplasmic reticulum Location in Supplies Both the energy or ATP 6. MITOCHONDRIA cytoplasm, for the cell bean shaped through cell respiration using glucose and oxygen Large open Storage tank Both storage area, for food, 7. VACUOLE smaller in water, wastes animal cells or enzymes Green Captures Plant structures sunlight and 8. CHLOROPLAST that contain uses it to chlorophyll produce food through photosynthesi s Small bags Packages and Both with tubes secrets 9. GOLGI BODY connecting proteins for them use in and out of the cell  Let Us Practice Activity 3: The factory as a Cell Floating around in the cytoplasm are small structures called organelles. Like the organs in your own body, each one carries out a specific function necessary for the cell to survive. Imagine the cells as a miniature factory. The organelles might represent working site, manager, workers, or departments of the factory because they each have similar jobs. Direction: Compare the cell to a city. Identify which organelle corresponds to the function of a city icon below. Write your answer on a separate paper. 1. WORKING SITE 2. MANAGER 3. WORKERS 4. ASSEMBLING AREA 5. PACKAGING DEPT. 6. DELIVERY TEAM 7. CLEANING TEAM 8. POWER PLANT  Let Us Remember In this lesson, we discussed the organelles structure and their functions and compare it to a factory part. We also learned that each structure has a specialized function and carry out specific task. Below is a table of organelles, function, and example we need to remember. Organelle Function Factory Part Nucleus DNA Storage Room where the blueprints are kept Mitochondrion Energy production Power plant Smooth Endoplasmic Lipid production; Accessory production Reticulum (SER) Detoxification Rough Endoplasmic Protein production; in Primary production line Reticulum (RER) particular for export out of the cell Golgi apparatus Protein modification and Shipping department export Peroxisome Lipid Destruction; Security and waste contains oxidative removal enzymes Lysosome Protein destruction Recycling and security Lesson Prokaryotic and Eukaryotic 3 Cells Let Us Study In lesson 2, you have learned about the cell structure and function of major and subcellular organelles. In this next topic, you will learn on prokaryotic and eukaryotic cells according to their distinguishing features. Did you know that cell is the basic unit of life? All living organism are composed of one to trillions of cells that work together to carry out life processes. Cells are classified into two types. Prokaryotic cells and eukaryotic cells. Are you now ready to learn how these two kinds of cells differ from each other? So, let’s get started and enjoy! Knowing our Cells All life on Earth consists of either eukaryotic cells or prokaryotic cells. Prokaryotes were the first form of life. Scientists believe that eukaryotes evolved from prokaryotes around 2.7 billion years ago. Cells fall into one of two broad categories: prokaryotic and eukaryotic. The predominantly single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotes (pro– = before; –karyon– = nucleus). Animal cells, plant cells, fungi, and protists are eukaryotes (eu– = true). All cells, whether prokaryotic or eukaryotic, share these four features: 1. DNA 2. Plasma membrane 3. Cytoplasm 4. Ribosomes Eukaryotic Cell Structure Eukaryotic cells are cells that contain a membrane-bound nucleus and many internal membranes called organelles. The eukaryotic cell has three main parts as follows. a. Cell membrane that separates the intracellular space from the outer space physically delimiting the cell. b. Cytoplasm, the interior portion filled with cytosol (the aqueous fluid inside the cell and contains all the organelles c. Nucleus, covered by double membrane that contains the genetic material. d. Ribosomes are molecular machines that synthesize proteins. Prokaryotic Cell Structure A prokaryote is a simple, single-celled organism that lacks a nucleus and membrane-bound organelles. a. The plasma membrane is an outer covering that separates the cell’s interior from its surrounding environment. b. Cytoplasm consists of the jelly-like cytosol inside the cell, plus the cellular structures suspended in it. In eukaryotes, cytoplasm specifically means the region outside the nucleus but inside the plasma membrane. c. DNA is the genetic material of the cell. d. Ribosomes are molecular machines that synthesize proteins. Comparison between a Prokaryote and Eukaryote Characteristic Prokaryotic Cell Eukaryotic Cell Size of cell Typically 0.1 to 5.0 μm in Typically 10 to 100 μm in diameter diameter Example Bacteria and Archea Animals, Plants, Fungi Nucleus Absent Present Membrane-enclosed Absent Present: examples: lysosomes; organelles Golgi complex; endoplasmic reticulum; mitochondria; chloroplast Flagella Consist of two protein Complex, consist of multiple building block microtubules Cell Wall Usually present; Only in plants and fungi- chemically complex chemically simpler Cytoplasm No cytoskeleton or cytoskeleton or cytoplasmic cytoplasmic streaming streaming Ribosomes Smaller Larger Number of One, but not true More than one chromosomes chromosomes Ribosomes Ribosomes are smaller Ribosomes larger (80s) (70s)  Let Us Practice Activity 4: Prokaryotes vs Eukaryotes Direction: In the following matrix, place a check (√) in the box if the cell has that component. Organelle Plant Animal Bacteria Vacuole Chloroplast Ribosome Mitochondria DNA Endoplasmic Reticulum Cell Wall Golgi Apparatus Direction: Fill-in the information needed below. COMPARE AND CONTRAST CELLS ALIKE DIFFERENCES  Let Us Remember In Lesson 3, you have learned that the cell is the basic unit of life, responsible for all biological activities of the living being whether its prokaryote or eukaryote. Both of these cells vary in their role, like prokaryotes are the old type of cells hence they lack a proper nucleus and other organelles too, which are very well present in eukaryotes, as these are advanced cells. Prokaryotes are single-celled organisms that lack a membrane-bound nucleus, mitochondria, and all other organelles. Eukaryotes are organisms with cells that contain membrane-bound nucleus and other membrane-bound organelles. Let Us Assess Read the questions carefully. Choose the best answer and write it on a separate sheet of paper. 1. What famous discovery did Anton Van Leeuwenhoek make with his homemade microscope? A. animalcules B. microscope and telescope C. all plants are made of cells D. bacteria on dental scrapings 2. What part of the cell theory did Schleiden and Schwann disagree on? A. the first part C. the second part B. the third part D. the fourth part 3. The cell Theory postulate that cell comes from free existing cells.Name the scientist that proved all cells come from other cells. A. Hooke B. Schwann C. Schleiden D. Virchow 4. What did Robert Hooke do to make Sir Isaac Newton mad? A. Insisted that cells came from Free Cell Formation B. Argue that portrait was misplaced because of Newton C. Reminded him of cells - the rooms that monks slept in D. Hooke claimed that Newton was inspired by his work in physics 5. Which cell organelles provides temporary storage of food, enzymes, and waste products? A. Chloroplast C. Ribosome B. Nucleus D. Vesicle 6. Which organelles is firm, form a protective structure and gives the cell its shape for plants, fungi, most bacteria, and some protists? A. Cell Wall C. Golgi apparatus B. Cytoskeleton D. Mitochondrion 7. It digests excess or worn-out cell parts, food particles and invading viruses or bacteria. Which of the following is considered as “suicide bags” of the cells? A. Flagellum C. Nucleolus B. Lysosome D. Ribosome 8. It is the biggest structure in the nucleus of eukaryotic cells and the site where ribosomes are made. A. Cytoskeleton C. Mitochondrion B. Ribosome D. Nucleolus 9. Which are small bumps located on portions of the endoplasmic reticulum? A. Lysosome C. Ribosome B. Peroxisome D. Vesicle 10. A student examines a cell under the microscope to determine if it is prokaryote or eukaryote. Which structure in the cell would indicate that it is a cell of eukaryote? A. cell wall C. Nucleus B. ribosome D. Vacuole 11. Which characteristics of prokaryotes organism makes them different from eukaryotes? A. Prokaryotes have DNA while eukaryotes do not have. B. Prokaryotes are made of cells while eukaryotes are not. C. Eukaryotes have chromosomes, while prokaryotes do not have. D. Eukaryotes have membrane bound organelles, while prokaryotes do not have. 12. Which two cell structures in the box below are present in eukaryotes but not in prokaryotes Nucleolus Cell membrane Nuclear materials A. 1 and 3 C. 2 and 3 Nuclear B. 1 and 4 d. 2 and 4 membrane 13. Is it TRUE that (I) prokaryote have nucleus, while (II) eukaryotes do not have? A. I but not II C. II but not I B. Both I and II D. Neither I nor II 14. Sometimes one celled organism aggregate in colonies like multi-cellular organism. With this condition, in what manner does the unicellular organism differ from multicellular organism? A. Each cell evolves and becomes B. Each cell carries out the function of life. C. Each cell is not complete without the other cells. D. Each cell is dependent upon the other cell’s function  15. Living organisms can be classified as prokaryotes or eukaryotes. Which two structures are common to both prokaryotic and eukaryotic cells? A. cell wall and nucleus B. cell wall and chloroplast C. plasma membrane and nucleus D. plasma membrane and cytoplasm Let Us Enhance Activity 5: Construct a 3D of a plant/animal cell using indigenous or recyclable materials. Follow the scoring guide below. Poor (6 pt.) Fair (8 pts.) Good (10 pts.) Exceeds (15pts.) Cell Model looks like Model cannot be Model clearly Model clearly Structure generalized cell. No identified as plant or represents an represents an /Cell Type distinguishing factors animal cell, because animal or plant animal or of a plant or animal it has characteristics cell, with 1 to 2 animal cell cell. of both a plant and cell part mistakes animal cell. Organelle 0-5 of cell organelle 6-9 of cell organelle 10-12 cell All cell function functions are described functions are organelle organelle and defined clearly described and functions are functions are and/or poorly defined clearly. described and described and described, there are defined clearly. defined clearly errors when being defined Cell details The work is done with The work was done The work was The work done poor effort. Cell parts with good effort. done with good exceeds all and organelles are not Most of the cell parts effort. Most of the expectations. detailed, they look like and organelles are cell parts and The cell parts unformed and/or distinguishable. organelles are and organelles misshapen making Most of the distinguishable. are easily them indistinguishable. organelles and cell Most of the distinguishable. parts are detailed organelles and All organelles accurately. cell parts are and cell parts detailed and accurately accurately. Labeled 0-5 of cell organelles 6-9 of cell organelles 10-12 cell All cell organelles labeled and/or errors are labeled and organelles are organelles are of labeling and placed correctly. labeled and labeled and placement of the placed correctly. placed correctly organelles. Creativity Lacks original artwork. Not very appealing. Contains Eye catching. Not students own Limited use of students own Great use of drawing/writing/crafts. creative materials. writing and colors, texture, Messy. Lacks color. Not a lot of drawing. Lots of shapes. color/shapes/design. colors, shapes, Artwork is the and appealing students own & design. Shows is neat. Writing the student spent is easy time creating an artistic piece. Appearance Not in required format Project is damaged, Project is correct Project is of and/or submitted late. poorly presented. size, clean and exceptional Pieces/items falling or Was possibly neatly displayed. quality and hanging off. submitted later than No items falling presentation. original due date. off. Submitted on Nothing Some items possibly due date. hanging or falling off. falling off. Submitted on time. Let Us Reflect Early evidence for the cell theory was provided by German scientists. In 1838, the botanist Matthias Schleiden concluded that all plants are composed of cells. A year later, the zoologist Theodor Schwann came to the same conclusion about animals. In 1855, Rudolf Virchow, a physician who had been studying how disease affects living things, reasoned that cell come only from other cells. Over the years, modern scientists have gathered much additional evidence that strongly supports the cell theory. Let Us Practice More Let Us Practice More B. A. Let Us Practice Let Us Assess Let Us Try Working Site -> Cytoplasm 1. D 1. A 2. B 2. D CEO -> Nucleus 3. D 3. B 4. D 4. B Workers -> Ribosome 5. D 5. C Assembly Line -> Endoplasmic Reticulum 6. A 6. A 7. B 7. A Packaging Department -> Golgi Apparatus 8. B 8. D 9. C 9. D Delivery Team -> Cell Membrane 10. C 10. D Cleaning Crew -> Lysosome 11. D 11. A 12. B 12. D Power Plant -> Mitochondria 13. B 13. D 14. B 14. D 15. D 15. D Answer Key References: https://resources.saylor.org/wwwresources/archived/site/wp- content/uploads/2010/11/Wiki-Cell-Theory.pdf Creative Commons Attribution-Share Alike 3.0 Unported http://creativecommons.org/licenses/by-sa/3.0/ https://www.storyboardthat.com/fr/storyboards/s162169/bio-comic-strip http://www.sc.chula.ac.th/courseware/2303101j/VIII-Cell.pdf http://www.sc.chula.ac.th/courseware/2303101j/VIII-Cell.pdf https://bio.libretexts.org/Bookshelves/Human_Biology/Book%3A_Human_Biology _(Wakim_and_Grewal)/05%3A_Cells/5.06%3A_Cell_Organelles https://2012books.lardbucket.org/books/an-introduction-to-nutrition/index.html Creative Commons by-nc-sa 3.0 Prokaryote and Eukaryotes Cell. Accessed July 20, 2020 from: https://www.google.com/search?source=hp&ei=xGwjX4K1BYL7- QbsqKTwBg&q=prokaryotic+cell+structure&oq=prokaryote+cell&gs_lcp=CgZ wc3ktY Difference of Prokaryote and Eukaryotes Cell. Accessed July 22, 2020 from: https://courses.lumenlearning.com/boundless-biology/chapter/eukaryotic- cells/ Type of Cells: Prokaryote and Eukaryotes Cell. Accessed July 20, 2020 from: https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biol ogy/Book%3A_General_Biology_(Boundless)/22%3A_Prokaryotes%3A_Bacte ria_a%20the%20nucleoid. For inquiries or feedback, please write or call: Department of Education – Davao City Division E. Quirino Avenue, Davao City Telephone: (082) 227 4762 Email Address: [email protected]