1. How can life be studied at different levels?

2. molecules cells organisms populations communities ecosystems biomes
atoms :
molecules
cells
organisms
populations
communities
ecosystems
biomes
the biosphere

3. Molecules Groups of atoms; smallest unit of most chemical compounds
Living things may be studied on many different levels. The largest and most complex level is the biosphere. The smallest level is the molecules that make up living things.
Water DNA

4. Cells Smallest functional unit of life
Living things may be studied on many different levels. The largest and most complex level is the biosphere. The smallest level is the molecules that make up living things.
Nerve cell

5. Tissues, organs, and organ systems
Groups of Cells
Tissues, organs, and organ systems
Living things may be studied on many different levels. The largest and most complex level is the biosphere. The smallest level is the molecules that make up living things.
Nervous tissue Brain Nervous system

6. Organism:
Individual species that can breed and produce fertile offspring

7. Populations
Group of same species living in the same area

8. Communities Different populations living together in the same area

9. Ecosystem:
community and its nonliving surroundings. 

11. Biomes: groups of ecosystems sharing similar climates and organisms
Biosphere: part of Earth that
contains all ecosystems.

12. Interdependence in Nature
All forms of life on Earth are connected together into a biosphere, which literally means “living planet.”

13. All of this is studied in the field of
Ecology: study of interactions among organisms and between organisms and their physical environment.

14. Organization with in organisms
Cell: smallest functional unit of life
Tissues: groups of same cell types working together
Organ: group of different kinds of cells working together
Organ System: group of different organs working together
Organism: individual living thing

15. Autotrophs:
living organisms that obtain their energy from the sun

16. Heterotrophs
living organisms that must obtain their energy by eating other organisms.

17. Humans:
are multicellular heterotrophs.

18. Biology in Everyday Life
More than any other area of study, biology touches your life every day.
How?
Uh… you’re alive….

19. Copyright Pearson Prentice Hall
Just an increase in size is known as
growth.
metabolism.
development.
differentiation.
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20. Which of the following is NOT a characteristic of all living things?
use of energy
made of cells
stable internal environment
need for oxygen

21. Copyright Pearson Prentice Hall
3. The genetic code is carried in
Water.
DNA.
proteins.
soil.
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22. Copyright Pearson Prentice Hall
4. Which of the following shows the levels of organization in correct order from the simplest to the most complex?
organisms, cells, populations, molecules, ecosystems
ecosystems, populations, organisms, cells, molecules
molecules, cells, organisms, populations, ecosystems
molecules, organisms, cells, populations, ecosystems
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23. Copyright Pearson Prentice Hall
quickly write the levels of organization from smallest to largest: 1 2 3 4 5 6 7 8 9
atoms
molecules
cells
organisms
populations
communities
ecosystems
biomes
the biosphere
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