BIO 110-03 Chapters 1-3
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Why study Biology
Biology tells how systems and organisms function and how we live, develop, modify and refine ideas about life.
What are the molecules of life (Organic, Macro or Biomolecules)?
- Nucleic acids
What are the most common elements in life?
- C Carbon
- H Hydrogen
- O Oxygen
- P Phosphorous
- S Sulfur
- N Nitrogen
Life’s levels of organization are:
- Organ systems
Reaction by which cells acquire and use energy to grow, survive and reproduce.
Capacity to do work
Type of atom or molecule that has essential role in growth and survival and that an organism cannot make for itself
- Break down remains / waste.
Everything that is not artificial
Fundamental building blocks of all substances
forms when two or more atoms of the same or different elements join in chemical bonds
Group of individuals fo the same kind of organism in a specified area.
All populations of all species in a specified area
A community interacting with its physical and chemical environment
Sensing and adjusting conditions of internal environment to maintain favorable conditions.
Helps us check an atom for vacancies
Atoms are chemically inactive if...
It has no vacancies in its outermost shell
A measure of an atom’s ability to pull electrons from other atoms
An attractive force that arises between two atoms when their electrons interact
Molecules that consist of two or more different elements in proportions that do not vary
An atom with different numbers of electrons and protons
Acquire energy and simple raw materials from environmental sources and make their own food
Cannot make their own food; they get energy and nutrients indirectly by eating producers and other organisms
Molecule or cellular structure that responds to a specific form of stimulation
The signature molecule of life
Orderly transformation of the first cell of a new individual into an adult
Group of species that share a unique set of features
Atom has the same number of protons but different number of neutrons
Mutual attraction of two oppositely charged ions
Two atoms share a pair of electrons
Molecules resist separating from one another
Measure of the number of H+ ions in a solution
Donate hydrogen ions as they dissolve in water
Accept hydrogen ions as they dissolve in water
A compound that dissolves easily in water and releases ions other than H+ and OH-
Unstable isotope that emits particles and energy when its nucleus disintegrates
Molecule that has a detectable substance (such as a radioisotope) attached
A chemical partnership between a weak acid or base and its salt
Properties of Water
- Bonds to hydrophilic
- Repels hydrophobic
- Temperature stable
- Expands when freezes
- Capacity to dissolve substances
- Unbound proton
- Have important biological effects
- Form when water ionizes
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