Biology Intro

1. Biology An Introductory Overview

3. Biology is the study of living things “Living things” are also known as organisms Organisms include bacteria, protists, fungi, plants, and animals. What is Biology?

4. Life arose more than 3.5 BILLION years ago Single-celled organisms were the only life forms for millions of years Those organisms evolved over time Where did it all begin?

5. There are millions of species covering the entire globe Today…

6. The basic unit of structure of all organisms is the CELL. All organisms REPRODUCE. All organisms have a genetic code (DNA). All organisms GROW & DEVELOP. All organisms use ENERGY. All organisms RESPOND to their environment. All organisms maintain HOMEOSTASIS. As a group, all organisms EVOLVE. All Organisms Share 8Characteristics…

7. The basic unit of structure of all organisms is the CELL. Unicellular Organism Multicellular Organism

8. All organisms have a genetic code (DNA).

9. All organisms REPRODUCE. Sexual Reproduction DNA from 2 different parents Asexual Reproduction Single parent (cloning or budding)

10. All organisms GROW & DEVELOP.

11. Growth vs. Development GROWTH= Getting larger DEVELOPMENT= Changing Shape and Structure

12. All organisms use ENERGY.

13. All organisms RESPOND to their environment.

14. Stimulus = a signal to which we respond “The HOT PAN” Response= a reaction to a stimulus “Dropping the pan”

15. All organisms maintain HOMEOSTASIS.

16. As a group, all organisms EVOLVE.