What’s Living, what’s Non-living

• Composed of matter• Organized in atoms• Living on Earth• Engaging metabolism• Engaging

reproduction• DNA present

• Composed of matter• Organized in atoms• Living on Earth• Not engaging

metabolism• Not engaging

reproduction• DNA absent

Non-LivingLiving

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 LifeLife 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 LifeLiving organisms are organized in a certain fashion

• 1) Biosphere: all the environments on Earth inhabited by life

• 2) Ecosystem: made of non-living 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 LifeLiving 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?

Organ<

orga

nism< t

...

Orga

n sys

tem< o

rgan...

Cell< tis

sue<

orga

n

Tiss

ue< o

rganis

m< cell

25% 25%25%25%1. Organ< organism< tissue

2. Organ system< organ< tissue

3. Cell< tissue< organ4. Tissue< organism< cell

Shared Characteristics of LifeLiving 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 LifeLiving organisms sense and respond to change

Homeostasis is the ability of an organism to maintain its internal environment conditions within tolerable limits

Homeostasis is the organism’s ability to maintain the conditions of their internal

environment within ____ limits.

High

Non-to

lerab

le

Toler

able

Low

25% 25%25%25%1. High2. Non-tolerable3. Tolerable4. Low

Shared Characteristics of LifeLiving 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