Biology 101

the study of life

• 1) made of cells
• 2.) grow,develop, and die
• 3.) reproduce, and pass on their organization(cells, DNA)
• 4)take in chemicals and energy from the environment
• 5)evolve
• 6)respond to stimuli
• 7)homeostasis
• 8)members of an ecosystem

tendancy of a system to maintain a set point even though there is caration around that set point

collection of interacting living and nonliving things in an area

specific to general

if...then...

consistant

change in variable

• simple, testable,
• controls
• sampling
• models
• humans(informed consent)
• falsifiable
• repeatable
• publish

• hypothesis that has not been disproven
• very broad, explain many phenomena

right or wrongness of an act, not about consequnces of the act

acts are judged right or wrong based on the consequences of the act

fundamental particle of nature

central part of atom contains:protons and neutrons

positive charge

neutral no charge

negatively charges

atoms react with each other in order to achieve a full outer shell

atom that carries a charge because it has an unequal number of protons and electrons

strong mutual attraction of two oppositely charged ions (medium strength)

group of two or more atoms joined by chemical bonds

type of molecule that contains different atoms

2 atoms share a pair of electrons H2 o2

ends are not the same (small charges)

very weak, due to the attraction between polor molecules

a sissoluted substance

liquid that the substance dissolves in (h2o)

• molecules resist separating due to H bonds
• surface tension

level of H+ in solution

sets of chemicals that help the pH of a solution constant (blood)

• co2 froms carbonic acid in water
• bicarbonate buffer system

• lots of Carbon
• monomer(single building block) polymer(chain)

adding water

• 1)protein(metabolism)-form structures and enzymes
• 2)carbohydrates-energy source
• 3)lipids- long term energy storage-hormones
• 4)nucleic acids-information storage