Biology 110 Test #1
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Study of organisms and their environment
7 characteristics of life: Growth and Development
Growth from the inside
7 characteristics of life: Metabolism
The chemical reactions taking place inside
7 characteristics of life: Irritability
A response to the environment
7 characteristics of life: Reproduction
Making more of the same kind of organism
7 characteristics of life: Order
There is an organization to each organism
7 characteristics of life: Homeostasis
Maintaining a relatively steady state
- a. Body Temperature
- b. Glucose Concentration
7 characteristics of life: Evolution
The changing of a population of species
Lots of variation between species
What are the three major ways by which all kinds of organisms are united?
- 1. All are made up of cells (One or Many)
- 2. All have DNA as their hereditary material
- 3. Characteristics of life
Is it true that the concept of evolution ties all organisms together?
Operates on the variation to bring about evolutiuon
An expression of the DNA
3 Domains of organisms
- Eukaryota (Animalia, Pantae, Fungi)
- Archaea (Prokaryots)
- Bacteria (Staphylococcus aureus, MRSA)
What are the categories starting with the Domain that are used to classify the organism?
What are the levels of organization starting with the chemical level and ending with the biosphere?
- Organ System
Can an individual evolve or is it a population that evolves?
When was Charles Darwin born and when did he die?
What were his two major observations and what was his conclusions?
1. Overproduction and Competition: Any population can produce far more offspring than the environment can possibly support.
2. Individual Variation: Individuals in a population of any species vary in many inherited traits.
Conclusion - Unequal Reproductive Success: The very traits that enhance survival and reproductive success will be disproportionately represented in the next generation.
What was the title of Charles Darwin's Book?
The Origin of Species by means of Natural Selection
A group of population whose members have the potential to interbreed with one another in nature to produce fertile offspring.
What are two examples of evolution in progress?
Name in the correct sequence the five steps in the 'scientific method'.
Define 'Independent Variable'
The experimental condition that is manipulated by the scientist.
Define 'Dependent Variable'
The condition that will be observed and measured in response to the experimental conditions.
What does science tell you?
How things are and probably will be, not how things should be. It is self-correcting as new facts are discovered.
Is it true that we should make our decisions based upon testimonials.
What is an 'atom'?
Smallest unit of matter that still retains the properties of an element.
What is an 'element'?
A substance that cannot be broken down into other substances by chemical reactions.
What is a 'molecule'?
A group of two or more atoms held together by covalent bonds.
What is a 'compound'?
A substance containing two or more elements in a fixed ratio.
What is an 'electrolyte'?
A substance that ionizes when dissolved in suitable ionizing solvents such as water.
Formula for Glucose
Formula for Respiration
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy
Where is energy contained?
In chemical bonds
What are the three basic parts of an atom and where are they located?
Protons (+ charge), Electrons (- charge), Neutrons (neutral charge)
Do we have ions in our bodies?
What is an 'isotope'?
An atom of an element with more neutrons
What are isotopes of carbon?
C-12, C-13, C-14(Radioactive)
What does 'Half-Life' mean?
The time taken for the radioactivity of a specified isotope to fall to half its original value.
Do isotopes of an element react chemically the same way?
Do isotopes have different numbers of neutrons?
What are the two important uses of radioactive isotopes?
- Radioactive Dating
- Killing Cells
What are the three types of chemical bonds?
- Ionic Bond
- Covalent Bond
- Hydrogen Bond
- Hold inorganic substances together
- NaCl: Table Salt
- Atoms share electrons
- H20 = water molecule
Holds one molecule to another water molecule.
Which Bond holds us together?
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