1. 7th Grade Curriculum Life Science Classification of Organisms
Structure and Function of Cells
Systems in Living Things
Reproduction & Heredity
Evolution & Biodiversity
Living Things & Their Environment
Energy & Living Things
Changes in Ecosystems Over Time

2. Classification of Organisms
Classification is the arrangement of organisms into orderly groups based on their similarities.
Levels:
Kingdom- large general group
Phylum-
Classes-
Orders-
Families-
Genus-
Species- one kind
Hint:
King----Kingdom
Philip---Phylum
Came--Classes
Over----Orders
For------Families
Grape--Genus
Soda---Species
Kingdom’s are continuously broken down into classified groups until species

3. Classification Levels

5. Kingdoms All living organisms belong to one of the kingdoms
Plantae
Protista
All living organisms belong to one of the kingdoms
There are five Kingdoms:
Bacteria- E. coli,
Protista- single-celled organisms
Plantae- plants, flowers & trees
Fungi- fungus, mold & mushrooms
Animalia- animals, people, pets, bugs
Animalia
Fungi
Bacteria

6. Fundamental Characteristics
Cell Type
Eukaryote
Prokaryote
Ability to get food
Autotroph (producer)
Heterotroph (consumer)
# of cells in body
Unicellular (single)
Multicellular (many)

7. Structure and Function of Cells
Cells are the basic units of life.
All living things are made of cells.
Cells are very small and can only be seen with a microscope.

8. Cells There are different types of cells:
Animal Cells
Plant Cells
Some living things are multi-cellular
Example: plant, animal
Some living things are unicellular
Example: bacteria, yeast

9. Plant Cell Plant Cells are found in plants.
Unlike Animal Cells, Plants Cells contain: Cell Wall & Chloroplasts

10. Animal Cell Animal Cells are found in animals
Unlike Plants Cells, Animal Cells contain:
Centrioles

11. Parts of the Eukaryote Cell
Cell Membrane- keeps cytoplasm in; allows nutrients in & waste out
Nucleus- holds cell’s DNA
Nucleolus – makes ribosomes
Cytoplasm-fluid in cell
Endoplasmic reticulum –
Ribosomes – make protein
Golgi apparatus –
Vesicle – transports proteins
Mitochondria – breakdown food in the cell
Centriole – used during mitosis

12. Additional Parts of a Plant Cell
Cell Wall-the outside of the cell that strengthens the cell membrane
Chloroplasts-hold green chlorophyll for photosynthesis
Vacuoles- store water & fluid
AND…
NO CENTRIOLES
NO LYSOSOMES

15. Cellular Functions Cells function similar to living organisms:
Extracting Energy from Food
Disposing of Waste
Reproduction (Mitosis)

16. Molecules (DNA, protein)
Cells & Body Tissues
Organs
Systems

17. Systems in Living Things
The Human Body’s Major Functions:
Digestion: Food Energy
Respiration: Breathing
Reproduction: Population
Circulation: Blood Flow
Excretion: Waste
Immune: Protection from Disease
Movement, Control, Coordination: Moving, Thinking, Planning, Processing

18. So Many Systems… Body Systems Rap (with handout)

19. Human Body Systems

20. Heredity All living things have traits.
Trait information (gene) is stored in chromosomes.
These are passed on from one generation to the next in genes.
Human cells contain ~30, different genes on 23 different chromosomes.
Punnett Squares show
possible inheritance.

21. Monohybrid Crosses

22. Reproduction There are 2 types of reproduction:
Sexual: 2 Parent Cells Join Together to Form a New Individual; Offspring Inherit Half of Their Genes from each Parent
Example: Plants & Animals
Asexual: only 1 Parent Cell is Needed; Parent Cell is Copied; Mitosis Occurs
Example: Single-celled Organisms

23. What does this show?

24. What does this show?

25. Dividing Body Cells (Growth and Repair)

26. Making Gametes (Sex Cells)

27. Parent
Daughter
cells

28. Evolution & Biodiversity
Evolution: populations adapt and change over time through natural selection
(ORGANISMS DO NOT EVOLVE)
Evidence: geology, fossils, comparative anatomy
Extinctions: many species have not been able to adapt to habitat changes over time
Survival of the (fittest) best suited to the environment

29. Evolution
Evolution: populations adapt and change over time through natural selection
(ORGANISMS DO NOT ADAPT)
Natural Selection – change in phenotypes over many generations
Predict what will happen to the fur coat color of these mice after many generations. VIDEO

30. Evidence
Geology

31. Evidence
Fossils

32. Evidence
Comparative anatomy

33. Extinction
Extinctions: many species have not been able to adapt to habitat changes over time

34. Biodiversity Anole 3 min video
Increased variation in population can allow for new species to develop
Forming new species increases biodiversity VIDEO

35. Living Things & Their Environment
Organisms interact with one another and have different functions within an ecosystem that enable the ecosystem to survive.
Symbiotic Relationships
Parasitism
Commensalism
Mutualism
Predator / Prey relationship

36. Predator / Prey relationship

37. Symbiotic relationships
Living in close contact with another species.
Parasitism Commensalism Mutualism

38. Roles in an Ecosystem Producers- use sunlight to make food
Example: Plants
Consumers-eat producers & organisms
Example: animals
Decomposers-break down remains of
dead organisms
• Example: bacteria & fungi

39. Energy in an Ecosystem Food Web- Energy from food flows from
one organism to another
Can you find the producers?
Can you find the consumers?
Name a…
primary consumer
secondary consumer
tertiary consumer

40. Food Chain

42. Decomposers & Nitrogen Cycle
Decomposers- Living organisms break down dead plants & animals (bacteria, fungus)
Nitrogen is produced in this cycle.
Broken down material is used for compost and has nutrients in it that contribute to the system.

44. Water Cycle

45. Photosynthesis
Plants use energy from sunlight to make sugars from carbon dioxide and water through photosynthesis.
This food can be used immediately, stored for later use, or used by other organisms.

46. Photosynthesis
The process where plants capture light energy from the sun and change it into food.

47. Ecosystems Ecosystem- the habitat of living organisms
Land: Forests, Grasslands, Deserts, Tundra
Marine: Beaches, Seafloor, Reefs
Freshwater: Moving Water, Still Water, Wetlands

48. Earth's Ecosystems

51. Changes in Ecosystems Over Time
Changes in the ecosystem can cause extinction, habitat damage, & global warming.
Ecosystems are effected by:
Pollution
Resource Depletion
Alien Species
Human Population Growth
Habitat Destruction

52. Gradual Change in Ecosystem

53. How many factors of ecosystem change can you find?