Evolving Concept of Life Based on Emerging.pptx

Quarter2 Week1 Earth and Life Science

1. Evolving Concept of Life Based on Emerging Pieces of Evidence

2. OBJECTIVES E xplain the evolving concept of life based on emerging pieces of evidence 1. Identify the sequence of events of the history of life on Earth. 2. Name the pieces of evidence on the evolution of life on Earth. 3. Recognize the importance of knowing the history of life on Earth.

3. Have you been curious of when and where did life possibly start on Earth?

4. Introduction to Life Science Life science refers to  the  scientific study of  living  organisms ,  including their  structure , function,  growth , evolution, and  interactions  with their  environment .

5. Scope of Life Science Biology : The study of  life  and living organisms,  including  their physical  structure ,  chemical   processes ,  molecular  interactions,  physiological  mechanisms,  development , and evolution.

6. Zoology : The study  of  animals and their  behavior , physiology,  and  classification . Botany : The study of plants, including their  structure , properties,  and  biochemical  processes .

7. Microbiology : The study  of  microorganisms,  including   bacteria , viruses, fungi, and  protozoa. Genetics : The study of  heredity  and the variation of  inherited  characteristics. Ecology : The study of  interactions  between  organisms  and their  environment .

8. Importance of Life Science/ Biological Science

9. Characteristics of Life Organisms belong to different kind share the following characteristics that allow us to identify that they are living: They are made of cells. They grow and develop. They are capable of reproduction. They exhibit metabolism. They respond to their environment. They maintain homeostasis .

10. Types of Organisms based on C ell Structure Eukaryote Prokaryote - any cell or organism that possesses a clearly defined nucleus -contain organelles Animals,plants , fungi, and protist may be unicellular, or multicellular -any organism that lacks a distinct nucleus and other organellesm due to the absence of internal membranes bacteria and archae unicellular

11. Types of Organisms based on C ell Structure Eukaryote Prokaryote Cell membrane cytoplasm DNA ribosomes

12. Have you been curious of when and where did life possibly start on Earth?

13. Timeline of Appearance of Life Forms The early earth is said to be violent because of the meteorites and volcanic eruptions. With this condition, zircon crystal was formed. Life on Earth initially began with prokaryotes, discovered in sedimentary rock formations called stromatolites .

14. Timeline of Appearance of Life Forms The first photosynthetic organism thrived the earth which is blue green algae called cyanobacteria. Appearance of the first eukaryotes and the influx of multicellular organisms occurred 1.2 billion years ago.

15. Timeline of Appearance of Life Forms The Paleozoic era when the trilobites and cephalopods became dominant in the ocean particularly during the Cambrian and Ordovician. The Mesozoic era-the age of reptiles that has a span of 251 to 65.5 MYA divided into Triassic, Jurassic, and Cretaceous period.

16. Timeline of Appearance of Life Forms The Cenozoic era- recent life and based on paleontological evidence. Homo erectus have evolved.