Slide 1: Characteristics of Life Section 1.1 What is Biology? : Section 1.1 What is Biology? Biology : Biology The study of Life Bio logy (greek) Life Study of Characteristics of Living Things : Characteristics of Living Things Biologists have formulated a list of characteristics by which we can recognize living things Living Things : Living Things What are some examples of living things?
●What about these things?
Rocks, bicycles, books Slide 6: What Does it Mean to Be Alive? The Characteristics of Life Slide 7: Life!!! All living things share some basic properties. Cellular Organization
Metabolism (Obtain and Use Energy)
Growth and Development
Adapt Through Evolution Slide 8: All Living Things are Made Up of Cells Unicellular Organisms Entire organism is made up of one single cell
Bacteria and protists Cells are basic structural units of life. Smallest unit capable of all life functions. Cells are the building blocks of all organisms = living things.
Two types of cells are: Multicellular Organisms The organism is made up of many cells
Cells have specialized functions within the organism Slide 9: Cells Slide 10: UniCellular Slide 11: MultiCellular Slide 12: All Living Things Reproduce Reproduction is the process of producing new organisms of the same type. Two types of reproduction Asexual Reproduction A single parent organism reproducing by itself Sexual Reproduction Two different parent organisms contribute genetic information
Involves the combination of male and female sex cells Slide 13: Asexual Slide 14: Sexual: a new genetic combination Slide 15: All Living Things Obtain and Use Energy Living organisms need energy to grow, develop, repair damage, and reproduce Slide 16: Anabolism The process of building up complex substances from simpler substances Building up cells and cellular components
Photosynthesis Slide 17: Catabolism The process of breaking down complex substances into simpler substances to release energy Digestion
Cellular Respiration Slide 18: Metabolism The total of all chemical reactions in an organism Anabolism + Catabolism = Metabolism Slide 19: A stable state of conditions in the body that are necessary for life Body temperature
Water balance All Organisms Maintain Homeostasis Slide 20: Stable Interior Conditions Slide 21: Even though exterior conditions are changing Slide 22: All Organisms Pass Along Hereditary Traits Genes carry hereditary information
Genes are composed of DNA
Heredity is the reason children resemble their parents Mutations change DNA code and can be passed from generation to generation Slide 23: All Living Things Respond to Their Environment Organisms react to stimuli:
Pressure An example is a plant’s leaves and stems growing toward light Slide 24: All Living Things Grow Growth means to get bigger in size Slide 25: All Living Things Develop Development involves a change in the physical form or physiological make-up of an organism - An example would be how a frog is conceived and born.
- A frog begins as a single cell in a fertilized egg and then grows into a tadpole and eventually into a fully grown frog. Slide 26: Development Slide 27: All Living Things Adapt to Their Environment Through Evolution Adaptation A process that enables organisms to become better suited to their environment
Species obtain adaptations through evolution over great periods of time Slide 28: An Example of Adaptation Desert plants have succulent waxy leaves and stems to store water and reduce water loss Living things adapt and evolve : Living things adapt and evolve Resources : Resources http://www.firstschoolyears.com/science/resources/games/ourselves/living/living.htm (sorting) http://www.teachersdomain.org/resource/tdc02.sci.life.colt.lp_living/ http://www.youtube.com/watch?v=OvMBJZLEwFs&feature=related (movie) http://www.youtube.com/watch?v=uM_CgOgJGG0&feature=fvw (movie w/ song) http://www.youtube.com/watch?v=PZ2FI50oecs&feature=related (note and voice)