Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
7 Characteristics of life |
Order Energy Processing- The Ability to do work *Autotrophs-Produce own food via photosynthesis *Heterotrophs- Ingest food from another orrganisms Growth and Development- Increase in size and possibly the # of cells. Response to stimuli- mostly directed toward minimizing injury, acquiring food, and reproduction Reproduction- Life comes only from other life (mutations in dna cause for individual variations) Regulation-Maintaining relatively stable internal conditions. Evolutionary Adaption- modifications that make an organism suited to its way of life. |
|
|
What is Biology? |
Posing Questions about the living world. |
|
|
Definition of Evolution |
The process of change that transformed life on earth. |
|
|
Prokaryotic Domains |
Domain Bacteria Domain Archaea |
|
|
Eukaryotic Domains |
Domain Eukarya |
|
|
Prokaryote Characteristics |
-Lack nucleus and other membrane- enclosed organelles -Unicellular -Generally smaller than Eukaryotes |
|
|
Eukaryote Characteristics |
-Contain a true nucleus and other membrane- bound organelles
-More complex -4 Kingdoms: Protista, Fungi, Plants, Animals |
|
|
Scientific Method |
1) Making Observations 2) Forming Logical, Testable Hypothesis 3) Testing the Hypothesis 4) Making more observations |
|
|
What is observation |
-Uses all of the senses -Use of Instruments -Recorded observations are called data |
|
|
What is a hypothesis |
-A tentative explanation of what you think is happening -Uses inductive reasoning -Uses past experiences |
|
|
What is an experiment |
-"If" "Then" Logic |
|
|
Variables and explinations |
-Constants:Things that must stay the same -Controlled Variable(control): The normal situation -Independent Variable(Experimental factor): Factor being tested -Dependent Variable(Responding variable): Result that occurs b/c of independent variable |
|
|
What is a conclusion |
-Analysis of collected data
-Often leads to a new question and hypothesis -Science is circular |
|
|
What are the 3 parts of an atom? |
Neutron Proton Electron |
|
|
What are the charges of the parts of an atom? |
Neutron- no charge Proton- Positive Electron- Negative |
|
|
Define Element |
Smallest substance hat cannot be broken down into other substances by chemical reactions
|
|
|
The 4 main elements |
O,C,H,N
|
|
|
Isotopes |
An element with differing number of neutrons causing for a different atomic mass
|
|
|
How is radioactivity used in biology? |
It is the imbalance of the ratio of protons to neutrons in an isotope and it can be used for dating fossils, they are also used as markers in medicine. |
|
|
Ionic Compounds (Transferring Electrons) |
-It is a give or take relationship (the compounds are salts) -They form between nonmetals and metals -Metals give an electron -Nonmetals take an electron -They are water soluable |
|
|
Covalent Bonds (Molecular Bonds) |
- formed between 2 non-metals -Each atom shares electrons |
|
|
What does the term polarity refer to? Explain why water is a polar molecule. |
-Polar covalent bonds share electrons unequally -The big three are O,N,F -The pull of one creates on side that is partially positive and another side that is partially negative. -Water is polar because O-H becomes O- and H+ |
