What makes something alive ?
What are living things?There are certain criteria that determine if something is living.
Yes, ALL 9 criteria must be met.
Do ALL 9 criteria have to be met?
Organism
• Anything that possesses all of the following characteristics of life.
• Living things R-CHARGEED !!
R -
All living things produce offspring. Making copies of individuals by genetic transfer, sexually or asexually.
eproduce
-Living organisms show an orderly structure (made up of cells)
Examples:
Leaf
Cross-section of worm
Centipede
C -C - ells
Example:
The ability to maintain internal conditions separate from an outside environment.
The human body maintains an average temperature of 98.6 ºF.
H -H - omeostasis
A living organism will respond to an environmental condition called a stimulus.
An adaptation is any characteristic of an organism that improves its chances of surviving in its environment
A plant growing in a specific direction due to a light stimulus.
A -A - dapt to the environmentR -R - espond to stimuli
Living Things Adjust To Their Surroundings
• -living things interact with the environment
• -environment- biotic (living) and abiotic (nonliving) factors that an organism must constantly interact with (air, water, temperature, other organisms, etc.)
• All of the changes that take place during the life of an organism. Maturing.
Amoeba absorbing nutrients
Growth rings in a tree
G -G - rowth Getting Bigger / Increasing materialD -D - evelopment
Growth-increase in number of cells
Metabolism. Chemical and energy transformations. All organisms need energy for all life activities. Even thinking requires a considerable amount of energy.
Transforming glucose into ATP for energy (to do work).
E -E - energy
The gradual accumulation of adaptations due to environmental stimuli. (Organisms with more suitable adaptations are more likely to survive and reproduce)
Example:
Owls, and other nocturnal animals have evolved large eyes for better night vision.
E -E - evolve