Unit 6: Living Systems

What is Biology? What is Life?

Biology Biology is defined as the study of life. The term biology is composed of two roots: bio = life logos = study of

Topics in Biology There are many topics which biology covers. Basic Biochemistry – Chemistry of life Cells – The building blocks of life Genetics – How life functions & reproduces Evolution – Life changing over time Taxonomy – Classification of living things Ecology – Interactions of living things Microbiology – Life too small for the unaided eye to observe

Who Studies Biologic Concepts? The Science Name & What they Study Botany Plants Cytology Cells Ecology Relations between living things and their surroundings Zoology Animals

All this creates a Question: What is Life?

Characteristics of Life All life has seven characteristics in common: Living things are made of cells. Living things maintain their internal environment. Living things pass on their traits. Living things perform chemical activities. This is known as metabolism. Living things grow and develop. Living things respond to a stimulus. Living things reproduce.

Todays goals… Complete and Submit: Unit 6 Study: 6.1.1 The Organization and Regulation of Organisms

6.1.1 Study: The Organization and Regulation of Organisms Open up a word document Put your name on it Title it: 6.1.1 Study: The Organization and Regulation of Organisms Once opened put a ✔by your name!!!

Organism: A living thing

Cells All living things are made of one or more cells. A cell is the smallest unit capable of all life processes Cell parts: Nucleus Cell Membrane Mitochondria Chloroplast Lysosome Ribosome

Homeostasis All living organisms must maintain a stable internal environment in order to function properly. The maintenance of a stable internal environment in spite of changes in the external environment is called homeostasis.

Metabolism Living organisms carry out different chemical reactions in order to obtain energy. The sum of all the chemical reactions carried out in an organism is called metabolism. Almost all of the energy used by living things originally comes from the sun.

Photosynthesis Cellular Respiration Use light energy to convert carbon dioxide and water into oxygen and sugars Takes place: Chloroplasts of plants Converts sugars and oxygen into carbon dioxide, water and energy the cell can use Takes place: Mitochondria

Response to Stimuli Living organisms respond to their external environment.

Can you think of a way that you have responded to your environment today?

Reproduction Most living things can reproduce. Reproduction is the process by which organisms make more of their own kind from one generation to the next.

Heredity & Evolution When an organism reproduces, it passes on its own traits to its offspring in a process called heredity. Inherited characteristics change over generations. This process is called evolution

Growth and Development All living organisms grow. As organisms grow, many change. This process is called development. Development differs from evolution because development refers to change in a single individual during that individual’s life.

Submit into moodle… Unit 6 Study: 6.1.1 The Organization and Regulation of Organisms Dropbox is under the week of April 28th Take the 6.1.3 Quiz