Where is Life??? EVERYWHERE!!! From the darkness of the deepest ocean floor to hundreds of thousands of year old ice in Antarctica Life comes in many different shapes, sizes and colors
The biosphere is made up of all living things and all of the places they are found on Earth. Every part of biosphere is connected Land, water, plants, animals and atmosphere
Variety of life across the biosphere. Increases from pole to equator. Why??? More living things are able to survive in consistently warm temperatures than in areas that have large temp changes. Larger, more consistent food supply for more species.
A particular type of living things that can reproduce by interbreeding among themselves. About 2 million different living species 10’s of millions remain undiscovered…? Over half are insects— how many exist?? No one knows!
Scientific study of all forms of life, or all types of organisms. Organism—any individual living thing. All organisms share certain characteristics: 1. Made of cells 2. Reproduction 3. Use energy 4. Evolve 5. Grow and develop 6. DNA 7. Homeostasis
Basic unit of life. Microscopic, single-celled organisms are most common forms of life on Earth. Unicellular or multicellular.
ALL organisms need a source of energy for their life processes Energy--Ability to cause change or to do work Some from environment, some make their own(absorb from light) Important for Metabolism—all of the chemical processes that build up or break down materials.
Must have ability to produce new individuals— fitness Single celled—one cell divides into two Multicellular— combine genetic info from two parents=YOU
Slow change over time Changes made to better survive in an environment
Respond to their environmental conditions Stimuli such as temperature, water, food supplies, light, sound….
Maintaining a constant internal condition Cells do this and organisms do this Internal conditions such as pH, temperature, water balance, etc
Maintenance of internal conditions Temperature, blood sugar, acidity must be controlled Breakdown in homeostasis can lead to death Maintained through negative feedback. Also maintained through behaviors
Deoxyribonucleic acid— carries all of your genetic information All organisms contain DNA DNA codes for proteins that make up cells and do all of the work in your body
Organisms grow by producing more cells and by cell enlargement They develop as they mature into an adult
A butterfly emerges from a cocoon A lizard sleeps in the sun to obtain warmth A runner eats a spaghetti dinner the night before the race Rust forms on an iron nail Wood is made up of the cell walls that separated tree cells A piece of paper is cut in half to form two smaller pieces A bird lays an egg that will hatch into a baby bird A tadpole gradually changes into a frog Birds fly south to find food in the winter A green plant converts water and carbon dioxide into sugar A spider lays its eggs in an egg sac A bacterium divides to form two bacteria