themes of biology and characteristics of life. what is biology? biology is the study of life bio=...
TRANSCRIPT
Themes in Biology Seven recurring themes that you will
encounter in this course: Stability and homeostasis Evolution Reproduction and Inheritance Structure and Function Development Energy Relationships Ecology
Stability and Homeostasis Homeostasis
The maintaining of very stable internal conditions
Can you give me examples of homeostasis?
Evolution Evolution is species
changing over time Happens over a
very long period of time
Evolution is the unifying theme of biology
Reproduction and Inheritance All living organisms come from other
living organisms Through the transmission of genetic
material Types of reproduction
Asexual- No exchange of genetic material (produces clones)
Sexual- Combining of genetic material from two different organisms
Structure and Function Structures of organisms are almost
always related to specific functions that allow the organism to survive in their environment
Can you give me some examples of where this is true?
Development All organisms are
composed of and develop from cells
Two types of organisms: Unicellular-
Composed of only one cell
Multicellular- Composed of more than one cells
Energy Relationships All organisms use energy Organisms can make their own energy
(autotrophs) Organisms must “eat” other organisms
in order to gain energy (heterotrophs)
Characteristics of Life ALL organisms on
the planet share the EXACT same eight characteristics of life
If one or more characteristics is missing, then is not considered living
Characteristics of Life1. All organisms are made up of at least
one cell
2. Highly organized1. Individual Cells- Specific cell structures
called organelles carry out specific functions
2. Multicellular organisms- Organized into:TissuesOrgansOrgan SystemsOrganisms
Characteristics of Life3. Uses energy through metabolism
4. Responds to the environment (from a stimulus)
5. Grows and develops