What’s Living, what’s Non-living
Living
•
•
•
•
•
Composed of matter
Organized in atoms
Living on Earth
Engaging metabolism
Engaging
reproduction
• DNA present
Non-Living
•
•
•
•
Composed of matter
Organized in atoms
Living on Earth
Not engaging
metabolism
• Not engaging
reproduction
• DNA absent
What’s Living, what’s Non-living
Metabolism?
How living organisms
master to live.
Metabolism is the ability
to acquire, use and
transform energy in order
to perform cellular
functions, to grow, and to
reproduce
What’s Living, what’s Non-living
Living on Earth?
What’s Living, what’s Non-living
How about
viruses?
What’s Living, what’s Non-living
DNA present?
Shared Characteristics of Life
Life emerges at the level of cells, which are organized units
of life
Shared Characteristics of Life
Common Features of Cells
• Cells can exist as independent organisms.
• Cells are composed of macromolecules that
participate in identical or similar metabolic
processes or chemical reactions.
• In all cells, genes are stored in DNA written in
the same chemical code
• All cells use the machinery of DNA transcription
and RNA translation to produce protein
molecules
Shared Characteristics of Life
Common Features of Cells
Shared Characteristics of Life
Common Features of Cells
Shared Characteristics of Life
Common Features of Cells
Pancreatic Secretory Cell
Shared Characteristics of Life
Living organisms are organized in a certain fashion
• 1) Biosphere: all the
environments on Earth
inhabited by life
• 2) Ecosystem: made of nonliving and living components —
deserts, prairies
• 3) Community: all the
organisms living in a particular
ecosystem
• 4) Population: all the
individuals of a specie living in
a specific area — human
population
• 5) Organism: an individual
living entity — a bird
Shared Characteristics of Life
Living organisms are organized in a certain fashion
• An organism is
constituted by several
organ systems
• Organ systems include
several organs
• Organs are made of
different tissues
• A tissue is an
arrangement of cells
• Cell parts are made of
macromolecules
Which group is correctly arranged
according to size?
1. Organ< organism<
tissue
2. Organ system< organ<
tissue
3. Cell< tissue< organ
4. Tissue< organism< cell
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25% 25% 25% 25%
Shared Characteristics of Life
Living organisms are interdependent
• Producers (plants and
other chemo- or
photosynthetic
organisms) are able
to synthesize
macromolecules that
consumers will intake
and digest
• Decomposers break
down organic matter
(dead or alive)
Shared Characteristics of Life
Living organisms sense and respond to change
Homeostasis is the ability of an
organism to maintain its internal
environment conditions within
tolerable limits
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To
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No
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1.
2.
3.
4.
Homeostasis is the organism’s ability to
maintain the conditions of their internal
environment within ____ limits.
High
25% 25% 25% 25%
Non-tolerable
Tolerable
Low
Shared Characteristics of Life
Living organisms reproduce, grow, and mutate
A mutation is an alteration of hereditary instructions. It
may have an adaptative value, which may lead to diversity
Diversity of Life