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BIOLOGY AND THE CHARACTERISTICS OF
LIVING THINGS
Bell Ringer Part 1• On the next open page in your journal
write the title Characteristics of Life.
• Write the following statement and bullet point at least 8 things that you think could accurately fill in the blank.
• In order for something to be alive, it must:_________________
Bell Ringer Part 2• Now make a table using the following list
to fill the left side column. Using your ideas for what is living, determine if the items on the list are living or non living:
tree, rock, boy, fire, wind, rabbit, cloud, feather, grass, seed, egg, bacteria, cell, molecule, sun, mushroom, potato,
detached leaf, butterfly, pupae, fossil, hibernating bear, mitochondria, river
What is Biology ?
• Study of life
• Helps us understand the living world
How do we know if something is living?
ALL LIVING THINGS :ALL LIVING THINGS :
1. Are made of cells1. Are made of cells
2. Can reproduce2. Can reproduce
3. Have a genetic code3. Have a genetic code
4.4. Grow and developGrow and develop
5.5. Obtain/use materials and energyObtain/use materials and energy
6.6. Respond to environmentRespond to environment
7.7. Maintain homeostasisMaintain homeostasis
8.8. Change over timeChange over time
1. Made of cells
• A cell is a collection of living matter enclosed by a membrane
• Smallest living unit of a living organism
• Sexual reproduction– Formation of an organism
from the union of gametes
from two parent organisms.
• Asexual reproduction– Formation of an
organism genetically
identical to the parent
that does not involve
the union of a sperm and an egg.
2. Can Reproduce
3. Have a genetic Code
• The genetic code with minor variations determines the inherited traits– DNA– RNA
4. Grow and Develop
• Grow and/or develop during part of their lives– Increase in size– Develop over time in different physical stages
5. Obtain/Use Materials and Energy
• Metabolism– Build up and break down of materials as it
carries out life processes– i.e. photosynthesis, cellular respiration
• Store and use energy
6. Respond to Environment• Stimulus
– Signal to which an organism responds• External--Outside of the organism (i.e.
temperature, light)• Internal--Within the organism (i.e. blood sugar
level)
7. Maintaining Homeostasis
• Homeostasis — balance within an organism
Example:
* sweating in
to cool down
* your body can regulate
blood sugar.
8. Evolve
• Change over long periods of time
• Organisms evolve in order to adjust to the
environment.