What is Biology n Biology is the study

What is Biology ? n. Biology is the study of life 1

SO… WHAT IS LIFE n n Life is defined by a list of characteristics organisms must possess to be considered living. All living organisms contain the same life functions although their means of achieving them may be different 2

Life Functions 1. Nutrition - activities of an organism, used to obtain materials from the environment and process them for their use. Two types of nutrition Materials Autotrophic CO 2 H 2 O Light energy Heterotophic organic food Process Photosynthesis Ingest, digest, egestion Organism Plants and algae other organisms 2. Transport - involves the absorption and distribution of materials within an organism. 3. Respiration - includes the chemical process by which an organism obtains energy (ATP) from its food (Glucose). 3

Life Functions 4. Excretion - the removal of wastes produced by cells during metabolic activities. 5. Synthesis - includes the chemical activities by which an organism builds larger molecules from smaller ones. (to Make) 6. Regulation - involves the control and coordination of various activities in an organism. (Nervous system and Endocrine system play a role) 4

Life Functions n n 7. Growth - increases in cell size and/or cell numbers. 8. Reproduction - production of new individuals. A species survival depends on reproduction. An individual’s life does not. 5

II. Important Terms 1. Metabolism - refers to all the life functions needed to sustain life. Does not include reproduction 2. Homeostasis - the maintenance of a stable internal environment. (Regulation helps to achieve Homeostasis) • Your body systems are constantly adjusting to maintain homeostasis. 6

MR STRANGER n n n n n M=Metabolism R= Respiration S= Synthesis T= Transport R= Regulation A= Ambulation (Locomotion) N=Nutrition G=Growth E=Excretion R= Reproduction Hi Guys!!! I’m Mr Stranger 7