Download BIOLOGY: The Study Life

BIOLOGY: The Study of
Organisms
Bios = life
ology = study of
Characteristics Of Living Things
Composed of cells
The smallest component of life.
Unicellular = 1 cell
Multicellular= many cells
All multicellular organisms have differentiated cells, that each
have specialized functions.
Reproduction
Genetic Code – directions for inheritance (DNA)
Sexual = DNA from 2 different parents
Asexual = single parent (cloning, budding)
Growth and Development
These processes allow organisms
to mature and gain the ability to
reproduce.
Controlled by DNA and RNA.
Use Energy
Important for metabolism, all of the chemical
reactions in the body
Animals eat to obtain energy
Plants photosynthesize
Response to environment
Stimulus = a signal
Response = a reaction
Internal Balance
Homeostasis – maintaining constant internal
conditions (sameness)
Evolution - species change over time
Branches of Biology
Zoology = animals
Paleontology = ancient
life
Cytology = cells
Botany = plants
Entomology = insects
Microbiology =
Ecology =
Anthropology =
Levels of Organization
Molecule
Cell
Tissue
Organ
Organ Systems
Organisms
Population
Community
Ecosystem
Biosphere
CHECK FOR UNDERSTANDING
1. List the characteristics of life.
2. The smallest unit of life is the ___________
3. All living things must be able to ____________________, or to make more of
their own kind.
4. All living things have a _____________________, which are like instructions
for building the body
5. During development, some cells become liver cells, some become skin cells and
some become muscle cells. This process is called ________________________
6. Animals get their _______________ by consuming food.
Plants get it by __________________________________
7. __________________________ is the maintaining of an internal balance, or
sameness.
8. ______________________ is the process where species change over time.