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20 Cards in this Set

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What kind of questions can science answer?
Science helps to explain observable phenomena
What is a hypothesis?
A hypothesis is an educated prediction.--based on some prior knowledge of the subject
Hypothesis Testing
To gain support for hypothesis it must be tested. Hypothesis are supported/accepted or rejected.
What is a scientific theory?
A hypothesis that has been repeatedly supported by a vast amount of experimental data and observations.
What is a scientfic law?
A hypothesis that has gained so much support and the fact that there has been no other hypothesis to discount it.
Scientific Method of Testing Hypotheses
1. Ask a question
2. Form a hypothesis and make a prediction
3. Conduct experiments, make observations, collect results
4. Form a conclusion based on results
What is biology?
Biology is the scientific study of life.
What are the Properties of Life?
1. Order (structure)
2. Evolution/Adaptation (populations can adapt over time)
3. Response (to environment)
4. Regulation (regulate itself to the environment)
5. Energy Processing (food, sun light)
6. Growth & Development
7. Reproduction
Hierarchy of Biological Organization
1) Atom (smallest unit)
2) Molecule
3) Organelle (part of a cell)
4) Cells
5) Tissue (skin)
6) Organ (heart made of muscle tissue)
7) Organism
8) Population
9) Community
10) Ecosystem
Emergent Properties of Systems
New properties emerge with each step up in the hierarchy of biological order
Diversity & Unity of Life --

What is taxonomy?
The branch of biology that names and classifies species
Grouping Species
Organisms grouped together based on shared traits
Three Domains of Life
Bacteria
Archaea
Eukarya (kingdoms..)
Domains - Bacteria & Archaea
Consist of prokaryotes
Domain - Eukarya
Have eukaryotic cells
Protista & Fungi (kingdoms)
Plantae & Anamalia (kingdoms)
Unity in Diversity
There is evidence of shared ancestry.
Evolution contributes to diversity.
Natural Selection
"Origin of the Species" by Darwin
Natural selection if the mechanism of evolution
Summary of Natural Selection
What are Darwin's Observations?
1) Individual variation - individuals w/in a population vary in many heritable traits
2) Struggle for existence - limited resources limit number of surviving offsprings
3) Differential reproductive success - those w/ best suited traits survive better & thus reproduce more than those with less favorable traits
What is meant by Form Fits Function?
Organisms adapt physically to special circumstances of their way of life
Examples: Bird's hallow & light wing bones to enable flight; bird's wing shaped to enable flight; duck's webbed feet to enable movement through water
Sharing of Ancestors - Charting
Use of a Cladogram meant to show evolutionary relationship among species