Cells and Tissues 1. Which of the following is NOT a membranous organelle? a. Lysosomes b. Peroxisomes c. Mitochondria d. Ribosomes e. Endoplasmic reticulum Answer: d 2. Which organelle contains digestive enzymes? a. Rough endoplasmic reticulum b. Smooth endoplasmic reticulum c. Lysosome d. Golgi apparatus e. Mitochondria Answer: c Lysosomes are membrane bound sacs of digestive enzymes. They are nicknamed "suicide sacs". 3. Which organelle is considered the powerhouse
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The cell is the fundamental structural unit of all living organisms. Some cells are complete organisms‚ such as the unicellular bacteria and protozoa; others‚ such as nerve‚ liver‚ and muscle cells‚ are specialized components of multi-cellular organisms. Cells range in size from the smallest bacteria-like mycoplasmas‚ which are 0.1 micrometer in diameter‚ to the egg yolks of ostriches‚ which are about 8 cm (about 3 in) in diameter. Although they may differ widely in appearance and function‚ all cells
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3.1 Cell Theory KEY CONCEPT Cells are the Basic unit of life. 3.1 Cell Theory 3.1 Objectives Describe developments that led to the cell theory. Differentiate between eukaryotic and prokaryotic cells. 3.1 Cell Theory The cell theory grew out of the work of many scientists and improvements in the microscope. • Many scientists contributed to the cell theory. 3.1 Cell Theory The cell theory grew out of the work of many scientists and improvements in the microscope. • Many scientists
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Biology 1003 - Cells: Size‚ Structure and Microscopy Introduction What is life? What are the key factors that biologists have defined that apply to every single organism on the planet? In the 17th century‚ due to the amazing advancement of the microscope‚ biologists created a theory to differentiate the living from the non-living called the cell theory. One concept from the theory is that all living organisms are composed of one or more cells. The importance of studying cells is akin to the
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observations are repressentative of cell division taking place in the oinon root tip. Firstly‚ this is because our numbers of the number of cells in each phase of mitosis are similar to the rest of the groups‚ so we can assume our results are most likely correct. We can also assume our calculations are right because we know that Interphase is the most active phase in the process of cell divison‚ which would agree with our calculations since we assume that approxiamtly 93% of cells are going though Interphase
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# Cell Part Kingdom Analogy Why this analogy makes sense 1 Nucleus King The nucleus is the largest organelle and directs all cell activity‚ just like a king who controls and directs activity going on throughout the kingdom and is known as the biggest person in relation with power. 2 Nucleolus Peasants The nucleolus is the organelle which produces the ribosomes (farm) throughout the cell‚ just like the peasants who work hard to keep the farm fertile and running. 3 Ribosomes Farm The ribosomes
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Chapter 5.1 The Cell Cycle and Mitosis Pg152-158 Notes Cell Replacement and Development -Cells continue to divide as you continue to grow. -Muscle & nerve cells usually do not continue to divide in adult. The Cell Cycle -Life of cell = divided into 3 stages called cell cycle. -Stages = Interphase‚ Mitosis and Cytokinesis -Interphase= cells carry out functions necessary for survival and cells that divide prepare for reproduction. -Mitosis divides duplicated contents of cell’s nucleus into 2 equal
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The Human Egg Cell. The human egg cell is also known as the ovum. With a spherical structure it is the largest cell in the human body measuring about 0.2mm in diameter. The function of the ovum is to reproduce‚ when fertilized by the sperm cell the ovum is capable of creating a new living organism. The size and shape of the ovum gives it space to store and create nutrients (see fig 3) (Boyle and Senior 2008) The ovum is bounded by the egg follicles of the ovaries and is produced by primitive germ
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PLANT CELL AND ANIMAL CELL LECTURER : ENCIK AZHAR GROUP’S NAME : 2. Mohd Alimi 3. Suraya Hani 4. Norhaswana CONTENT INTRODUCTION 3 WHAT IS CELL? 4-5 HISTORY OF CELLS DISCOVERY 6 ANIMAL CELL 7 PLANT CELL
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SPECIALIZED CELL ANIMAL Sperm cells PLANT Xylem cells are specialised to find a female cell (egg cells) and join with it. They have tails‚ that makes them move in water to find and fertilize the female cell. They can move because they have many mitochondria located between the tail and the head‚ which gives them energy. In the head‚ there is a vacuole filled with acrosome‚ which is a specialized Lysosome that releases enzymes in order for the Sperm Cell to break into the Egg Cell‚ through the
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