Characteristic of Life II

Slide 1 :Life is diverse yet all living things share common characteristics. The Characteristics of Life


Slide 2 :1. Living things are organized.


Slide 4 :Photosynthetic organisms use carbon dioxide, water, and solar energy to make food. Animals obtain nutrients and energy from food eaten. Energy is the capacity to do work. Metabolism is the chemical reactions in the cell that convert food sources into energy. 2. Living things acquire materials and energy.


Slide 6 :Reproduction may be asexual or sexual. Offspring inherit traits from their parent(s) (Heredity). The inherited information is encoded in DNA, the genetic material. 3. Living things reproduce.


Slide 7 :Living things may respond to external stimuli by movement toward or away from a stimulus. Movement constitutes part of the behavior of an organism. 4. Living things respond to stimuli.


Slide 8 :Homeostasis is the ability of an organism to maintain relatively constant internal conditions. An example is temperature regulation in the human body. All organ systems contribute to homeostasis. 5. Living things are homeostatic.


Slide 9 :6. Living things grow and develop.


Slide 10 :Adaptations come about through evolution. Evolution is the process by which a species changes through time. Evolution explains both the unity and diversity of life. 7. Living things are adapted.


Slide 12 :8. Cells are the basic unit of life. Paramecia ingesting labeled yeast cells


Slide 14 :All living thing possess cells. Cells carry out: - metabolism, - maintain stable internal environments, - reproduce themselves - and use DNA to transmit hereditary information to offspring.


Slide 15 :Taxonomy is the science of identifying and classifying organisms according to specific criteria using these categories: Kingdom Phylum (Division) Class Order Family Genus Species The Classification of Living Things


Slide 16 :Archaea and Bacteria – unicellular prokaryotes that lack a membrane-bound nucleus. Eukarya – showing cellular complexity and having a nucleus and other organelles. There are three domains:


Slide 17 :Archaea live in harsh environments and may represent the first cells to have evolved.


Slide 18 :Bacteria, some of which cause human diseases, are present in almost all habitats on earth. Many bacteria are important environmentally and commercially.


Slide 20 :The Domain Eukarya is divided into 4 kingdoms. Protists (kingdom Protista) Fungi (kingdom Fungi) Plants (kingdom Plantae) Animals (kingdom Animalia)


Slide 23 :Most genera contain a number of similar species. Classification is based on evolutionary relationships. Each successive classification category contains more different types of organisms than the preceding category.


Slide 24 :Scientific names are binomial names, using genus and species.