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26 Cards in this Set
- Front
- Back
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Bertram N. Brockhouse |
Nobel Prize in physics 1994, neutron spectroscopy, born in Lethbridge |
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7 themes |
Evolution. Organisms interact with their environment, exchanging matter and energy. New properties emerge at each level in the biological hierarchy. Feedback mechanisms regulate biological systems. Cells are the simplest unit of life. Structure and function are correlated at all levels of biological organization. The continuity of life is based on heritable information in the form of DNA |
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Emergent properties |
The result from the arrangement and interaction of parts within a system. Characterize nonbiological entities. Difficult to predict. |
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_____ cells in an adult human body |
1x10^14 |
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What do ribosomes make? |
Protein |
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Eukaryotic Cells |
have organelles, Including a nucleus |
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ProKaryotic cells |
simpler and usually smaller than Eukaryotic. No nucleus or organelles |
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What do Feedback mechanisms allow biological processes to do? |
Self regulate |
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What is a Negative feedback mechanism? |
as more products accumulate, the process that creates them slows and less is produced |
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What is a Positive Feedback mechanism? |
as more products accumulate, the process that creates it speeds up and more is produced |
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What are the four biomolecules? |
protein nucleic acids Carbohydrates Fats |
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What does DNA stand for? |
Deoxyribonucleic Acid |
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Who first discovered the Double helix? |
Rosaline Frankline |
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Charles Darwin's two main points |
1. species showed evidence of "descent with modification" from a common ancestor. 2. natural selection is the mechanism behind "decent with modification. |
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What did Darwin's theory explain? |
Duality of unity and diversity |
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What did Darwin Infer? (2) |
1. individuals that are best suited to their environment are more likely yo survive and reproduce. 2. over time, more individuals in a population will have the advantageous traits. |
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The natural environment ______ for beneficial traits |
Selects |
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The three domains of life |
1. Domain Bacteria- Prokaryotes 2. Domain Archaea- Prokaryotes 3. Domain Eukarya- Eukaryotes |
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What do both Eukaryotes and Prokaryotes have in common? |
DNA and Cell membrane |
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Scientist use 2 forms of inquiry in their study of nature. What are they? |
1. Observation 2. Hypothesis-based science. |
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What is observation? |
describes natural structures and process, based on observation and the analysis of data. Relies on inductive reasoning. |
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Important limitations of Observation? (2) |
1. difficult to test. 2. difficult to understand the unexpected. |
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What is inductive reasoning? |
derive generalization based upon observations |
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What is Hypothesis-based science? |
-Observations can lead us to ask questions and propose hypothetical explanations called hypotheses -A hypothesis is a tentative answer to a well-framed question -A scientific hypothesis leads to predictions that can be tested by observation orexperimentation
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What are theories? |
-A system of ideas, based on general principles, used to explain nature. -Theories are very large in their scope. -A hypothesis is used to test theories -In the popular press, the word theory is often used instead of hypothesis. |
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What is Dogma? |
a set of beliefs, held by an authority, and expected to be accepted without argument |
