Lesson 3

• Biology - is a natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution
• System - is an organized group of interacting parts
• Cell - is a system of chemicals and processes
• 1. Atoms
  2. Molecule
  3. Cell
  4. Tissue
  5. Organ
  6. Body System
  7. Organism
  8. Population
  9. Community
  10. Ecosystem
• The body is a living system
• Ecosystem - includes living and non living things that interact is also a biological system
• Organisms in the ecosystem require a steady supply of certain chemicals to live
• Plants obtains most of their necessary chemicals from the soil, the water, and the air
• Animals acquire most of the chemicals they need by eating plants or other animals
• Chemicals are returned to the soil by bacteria and fungi that decompose the wastes and remains of organisms.
• Cell is the basic unit or the building blck of life
• Unicellular - if an organism is made of only one cell
• Muscles Cells - makes you move
• Multicellular - if an organism is made up of many cells
• Nerve Cells - transmit impulses to control the muscles
• Reproduction - involves the transfer of genetic information from parent to offsprint
• Inheritance - is the passing of genetic traits from parents to their offspring, and these offspring get all the genetic information from their parent. It also explains why parents and their children have similar characteristics
• No organism is completely isolated from its surroundings
• All organism need a source of energy to carry out life processes
• Metabolism - is a chemical process that buildin up or breakdown the materials
• The ability of the organism to regulate their internal conditions is an example of homeostasis or steady state
• Adaptation - it is inherited trait that helps organism's ability to survive and response on its particular environment
• Evolution - is the change in living things over time. It means "a process of change". is a change in the genetic make up of a subgroup/population of a species. is pimply an long-term response to the environment
• Microbiology - study of microorganisms
• Botany - study of plants
• Zoology - study of animals
• Divine Creation Theory - the oldest hypothesis that life came from a divine being
• The belief that life arose from nothing, but the power of a divine being is called creationism
• Spontaneous Generation - is idea that life could appear from non-living material
• Biogenesis Theory - it is a belief that life originate from pre-existing life. Proposed by Louis Pasteur
• Panspermia - a swedish scientist Svante Arrhenius popularized the idea that life arose outside earth and life that forms were transported from another planet to need life on Earth
• Panspermia - proses that a meteor or cosmic dust may have carried to earth significant number of organic molecules, which started the evolution. It cannot be tested experimentally
• Growth - living organism increase in size and number of cells
• Development - is the process by which an organism becomes a mature adult
• Response to Stimuli - a physical or chemical change in the environment produces a purposeful response
• Instinct - automatic reaction were born with
• Conditioned response - learned behavior
• All living things are composed of one more microscopic cells
• Vegetative Reproduction - Uniform Offspring grow from a part of a parent plant
• Fragmentation - a type of reproduction of cloning where one organism is divided into minor fragments