ELS Lesson 1 The Evolving Concept of Life PDF

Welcome to Science Class!  Quarter 2: Lesson 1 The Evolving Concept of Life Learning Competency At the end of this lesson, the given DepEd learning competency should be met by the students. Explain the evolving concept of life based on emerging pieces of ev...

Welcome to Science Class!  Quarter 2: Lesson 1 The Evolving Concept of Life Learning Competency At the end of this lesson, the given DepEd learning competency should be met by the students. Explain the evolving concept of life based on emerging pieces of evidence (S11/12LT-IIa-1).  Learning Objectives At the end of this lesson, the learner should be able to Describe the scope of life science. do the following: Describe the major features of life. Discuss the theories that explain how life emerged on Earth.  Question: What is biology? Bio means life and -ology means “study of” so biology literally means the study of life.  Question: What is biology? Biology is the study of all living organisms (and dead organisms, like fossils). Biology looks at how these organisms form, develop and interact with each other and their environment.  Question: What are the fields under biology?  Question: What is a theory? It is an idea or set of ideas that is intended to explain facts or events.  Question: What are some common theories about the origin of life? Life is believed to have existed on Earth for billions of years now. Scientists proposed several theories about how life developed and evolved based on pieces of evidence. What are the theories that tried to explain the origin of life? Enumerate the different organisms present Identify the characteristics they exhibit in the photo that proves they are alive Life Science Learn about It This is a collection of disciplines that is made up of theories and principles that tackle living organisms from the molecular level up to A mangrove swamp has many entire ecosystems. organisms in it Characteristics Learn about It of Organisms They respond to their environment. They grow and develop. They are capable of reproduction. They exhibit metabolism. They maintain homeostasis. They are made up of cells. Response toItEnvironment Learn about Living things respond to changes around them to survive. Plants respond to changes in the environment. Characteristics Learn about It of Organisms Growth andItDevelopment Learn about Growth is an increase in size, development is the differentiation of cells for specialization. Humans grow and develop from the womb. Growth andItDevelopment Learn about Capable of Reproduction Learn about It Reproduction refers to the creation of offspring. Sperm and egg cell Learn about It  Learn about It Exhibit Metabolism Metabolism refers to the total chemical reactions in the body’s cells that change food into energy. Learn about It Learn about It Maintain Homeostasis Learn about It Homeostasis is the body’s state of equilibrium. Homeostasis is defined as a self-regulating process by which a living organism can maintain internal stability while adjusting to changing external conditions. Maintain Homeostasis Learn about It Homeostasis is the body’s state of equilibrium. Huddling for warmth Learn about It Made ofabout Learn Cells It All organisms are made of cells which are the basic units of life. Blood cells Learn about It Characteristics Learn about It of non-living things mostly immobile on their own none to very simple responses to the environment do not reproduce Learn about It Theories as to how life on Earth began. 1. Spontaneous Learn about It Generation (Aristotle) The theory of spontaneous generation described that life comes from lifeless or nonliving material through a mysterious process. Spontaneous generation Spontaneous Learn about ItGeneration Abiogenesis is the natural process of creation of simple organic compounds from nonliving matter. Living things could arise from non-living thing Spontaneous generation Spontaneous Learn about ItGeneration Abiogenesis Ex. Rats came from garbage or dirty laundry Frogs came from mud Eels came from the slime in river mud Spontaneous generation Spontaneous Learn about ItGeneration Abiogenesis Spontaneous generation  Learn about It 2. Panspermia A meteorite  Learn about It (Richter and Arrhenius) 2. Panspermia This states that life on Earth was seeded from a celestial source (comets, other planets) Exogenesis as some of its hypotheses suggest that building blocks of life came from another planet  Learn about (Richter Panspermia It and Arrhenius) Exogenesis Life originated on another planet outside our solar system Life was then carried to Earth on a meteorite or an asteroid and colonized Earth. Panspermia Learn about (Richter It and Arrhenius) Exogenesis Interstellar dust and comets contain organic compound. Comets, which are largely made of water (ice) carry bacterial life across galaxies and protect it from radiation damage along the way -Fred Hoyler and Chandra Wickramasinghe 3. Divine Creation Learn about It Many people believe that life was out on Earth by divine forces. Creation theories that are common to many of the world’s religions and cultures. Learn about It True or False True or False: Learn about It 1.Abiogenesis states that living organisms originated from preexisting living organisms. FALSE 2. All living organisms are made up of cells TRUE 3. Maintaining a stable internal condition is not important to living things FALSE True or False: Learn about It 4. An individual living creature is termed a cell FALSE 5. The spontaneous generation theory is still considered a valid theory up to date. FALSE Learn about It  Think-pair-share Activity Notebook Seatwork 1: Theories Learn about It Dealing with How Life Emerged on Earth (2pts each) 1. What is life science? 2. What are the fields of life science? 3. The theory of spontaneous generation described that __________. 4.This theory was assumed to have originated from __________. 5. What is the theory of Panspermia? 6. How is abiogenesis differs from exogenesis? 7. What is a divine creation? Key Points Life science is a collection of disciplines made up of theories and principles that tackle the structure and function of living things starting from the molecular level up to entire ecosystems. An individual living creature is termed as an organism. All living organisms are capable of reproduction, growth and development, adaptation, movement, exhibiting metabolism, and maintaining homeostasis. Key Points The spontaneous generation theory and the panspermia are two of the classical theories regarding the origin of life. The primordial soup theory is one of the most valid theories trying to explain the origin of life on Earth.  Photo Credit Slide 13. Smallhuddle.jpg by Blalonde is licensed under CC BY-SA 4.0 via Wikimedia Commons.  Bibliography Alters, Sandra. 2000. Biology: Understanding Life. Massachusetts: Jones & Bartlett Learning. Dodd, Matthew S., et al. 2017. Evidence for early life in Earth’s oldest hydrothermal vent precipitates. Nature: 543, pages 60–64. Hench, Jason P. 2001. Science, Faith, and Ethics. Singapore: World Scientific. Oparin, Aleksandr Ivanovich. 2003. The Origin of Life. Massachusetts: Courier Corporation. Rastogi, Rakesh Kumar. 2007. Concepts of Biology XII. New Delhi: Rastogi Publications. Roy, Shri Hemant. 2005. Comprehensive MCQs in Biology.New Delhi: Golden Bells.  Bibliography Russell, Peter J., Paul E Hertz, and Beverly McMillan. 2016. Biology: The Dynamic Science. Boston: Cengage Learning. Schrum, Jason P., Ting F. Zhu, and Jack W. Szostak. 2010. The Origins of Cellular Life. Cold Spring Harbor Perspectives Biology. Shiel, Lisa A. 2009. The Evolution Conspiracy, Vol 1: Exposing Life’s Inexplicable Origins and the Cult of Darwin. Texas: Jacobsville Books.