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25 Cards in this Set

  • Front
  • Back
What are the 6 steps of the scientific method?
1. Observations
2. Questions
3. Hypotheses
4. Experiments
5. Results
6. Confirm/Contradict hypthoses
How are the best hypotheses presented?
In a way that can be falsifiable.
What is the definition of evolution?
The observation the life on earth has changed through time.
A fact, not a theory.
What is the definition of natural selection?
A theory explaining the observed fact that life on earth changes through time.
What are the six common themes in all organisms?
1. Made of cells
2. Same biological molecules
3. Reproduce by passing along DNA
4. Obtain and convert energy from surroundings
5. Sense changes in their surroundings
6. Organisims evolve (genes change from generation to generation)
What are the same biological molecules that all organisms have in common?
Lipids, proteins, carbohydrates, nucleic acids.
DNA=nucleic acid that codes for proteins.
What are the eleven levels of organization in nature? (A hierarchy)
1. Protons, neutrons, electrons
2. Molecules
3. Cell
4. Tissue/bone
5. Organ (eye)
6. Organ system
7. Multicelled organism
8. Population
9. Community
10. Ecosystem
11. Biosphere
What flows through all organisms?
What are producers?
Plants or other organisms that make their own food.
What are consumers?
Animals that eat producers.
What do decomposers do?
Break down sugars and other molecules which can be cycled back to producers.
Where is all energy eventually returned to?
What does the interconnection of organisms affect?
Structure, size, and composition of populations and communities.
In ____, who devised what classification system to organize the diversity of nature?
Carolus Linnaeus
Binomial nomenclature (every organism has a 2-part name)
What is the use of the names we give each organism?
To indicate a degree of evolutionary relationship bewtween organisms.
The Linnaean classification scheme uses 7 nested levels. What are they?
1. Kingdom
2. Phylum
3. Class
4. Order
5. Family
6. Genus
7. Species
Describe the archaebacteria kingdom. (3 things)
1. Bacteria.
2. Live in harsh environments--salt lakes, sewage treatment plants, guts of ruminants.
3. Special cell walls and cell membranes.
4. Prokaryotes.
Describe the eubacteria kingdom. (2 things)
1. "True bacteria" are widespread.
2. Prokaryotes.
What does it mean to be a prokaryote?
No nucleus or sac that surrounds the DNA.
Describe the protista kingdom. (4 things)
1. Bigger, more complex than bacteria.
2. Includes producers, consumers, and decomposers.
3. Includes "protozoans" and even includes giant, multicellular "seaweeds" or algae (kepls too).
4. Eukaryotes.
Describe the fungi kingdom. (4 things)
1. Common grocery store mushroom.
2. Multicellular decomposers and consumers.
3. Feed by secreting enzymes t digest food outside their bodies.
4. Eukaryotes.
Describe the plantae kingdom. (3 things)
1. Photosynthetic producers.
2. Cellular pipelines to moe water and solutes through roots, stems, and leaves.
3. Eukaryotes.
Describe the animalia kingdom. (2 things)
1. Consumers (herbivores, carnivores, parasites, scavengers).
2. Eukaryotes.
What does it mean to be a eukaryote?
To have a nucleus.
What is the hierarchy of the 6 kingdoms?
1. Archaebacteria
2. Eubacteria
3. Protista
4. Fungi
5. Plantae
6. Animalia