Characteristics of Life PDF

Textboo Glossary k Pages of Medical Terms Pages 1-25 26-30 Characteristics of Life Biology  Bio + Logy Science that studies life and living organisms Where can we find life and living organisms? How many species are living on...

Textboo Glossary k Pages of Medical Terms Pages 1-25 26-30 Characteristics of Life Biology  Bio + Logy Science that studies life and living organisms Where can we find life and living organisms? How many species are living on Earth? Diversity of life seems overwhelming.  The Characteristics of Life LIFE EXISTS ALMOST EVERYWHERE ON THE PLANET EARTH. EARTH POSSESSES A GREAT VARIETY OF DIVERSE LIFE FORMS. ALL LIVING THINGS HAVE CERTAIN CHARACTERISTICS IN COMMON.  1)Are organized 7) Have the 2) Acquire capacity to materials adapt and energy Characteristics of Life 6) Grow and 3) develop Reproduce 5) Are 4) Respond homeostatic to stimuli Living Things are: 1- Are organized Living Things: 1- Are organized 1- Living things are organized in a hierarchy of levels. A cell is the smallest unit of life A tissue is a group of similar cells that perform a particular function Several tissues join together to form an organ Organs work together to form an organ system  2- Life Requires Materials Energy – capacity to do work and Energy All living organisms need outside source of Materials and Energy Building blocks Capacity and ability to do work Sun is the ultimate source of energy The energy and chemical flow between organisms defines how an ecosystem functions.  3- Living Organisms Reproduce Starts with the Procreating union of sperm Reproduction and egg Life comes only from life Single cell Duplicating organisms simply split in two. Reproduction: to make another organism like itself Different species have different method of reproduction  4- Living Organisms Respond to Stimuli Respond often: Toward Moving Either voluntary or involuntary Behaviour Away Can you think of an example? human plant  5- Living Organisms Are Homeostatic Homeostatic means “staying the same“ internal environment of an organ is relatively constant Keep it balanced 6- Grow and Develop What is the difference between “grow” and “develop”?  Growth – increase in size or number of cells Development – changes that take place from conception to death  During last 4 billion years, our environment has constantly been changing Adaptation 7- Organisms Have the Capacity to Adapt Natural selection Evolution- explains both the unity and diversity of lif e.g., shape of beak adapted to the type of food available Tufted deer of China The gerenuk, a long-necked antelope found in the Horn of Africa Not all Adaption contribute to evolution Some examples: Different Architectural design Choosing proper cloths for the weather Using protective gears  1)Are organized Characteristics 2) Acquire materials and energy 3) Reproduce of Life 4) Respond to stimuli 5) Are homeostatic 6) Grow and develop 7) Have the capacity to adapt  Textbook Read Pages 1-6 Any Question? Send an email or a message on Teams 