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Bio 250 Exam with correct answers.
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BIOL 250 FINAL EXAM WITH VERIFIEDCORRECT ANSWERS
Robert Hooke - correct answer -developed the first microscope, used to look at plant
cells, first to use the term cells-- looked like what monks lived in
Anton Van Leeuwenhoek - correct answer -father of microbiology
first to look at living material-- scraped his teeth and saw that sick people had
different microogranisms than his did
Carolus Linnaeus - correct answer -binomial nomenclature
schleiden and schwann - correct answer -formulated the cell theory-- cells are
fundamental unit of life and carry out functions of all living things
Louis Pasteur - correct answer -swan flask experiment-- if the flask was tipped then
it would come in contact with particles and growth would occur immediately
Koch's postulates - correct answer -When determining the causative agent of
disease...
1. specific causative agent must be fond in every case of the disease
2. the disease organism must be isolated into pure culture
3. inoculate a sample of the culture into a previously healthy individual-- must
produce the same disease symptoms
4. culture recovered from the inoculated animal must be the same as the original
disease causing agent
What did Koch identify the causative agents of - correct answer -cholera-- Vibrio
cholerae
tuberculosis--Mycobacterium tuberculosis
anthrax-- Bacillus anthracis
,Phillip Semmelweis - correct answer -doctors should wash their hands-- connection
between doctors doing autopsies and delivering babies
Joseph Lister - correct answer -father of antiseptic surgery
atom - correct answer -smallest chemical unit
element - correct answer -composted of one kind of matter
molecule - correct answer -two or more atoms combied-- O2
compound - correct answer -multiple elements- C6H12O6
atomic weight - correct answer -sum of protons and neutrons
atomic number - correct answer -sum of protons in the nucleus
cations - correct answer -lose an electron when joined with another atom, become
more positively charged
anion - correct answer -gain an electron, become more negatively charged
isotopes - correct answer -atoms within elements that have different number on
neutrons-- ex. carbon12,13,14
gram molecular weight - correct answer -adding based on atomic weights
Avogadro's number - correct answer -6.023x10^23
ionic bond - correct answer -outermost electrons are transferred from one orbital to
another
, covalent bond - correct answer -sharing on electrons between orbitals-- certain
arrangements are favorable and can hold the structure of compounds together
hydrogen bond - correct answer -interactions among postvely and negatively
charged assets-- weak individually but stronger molecular strength when grouping
catabolism - correct answer -two elements/compounds joined together to release
the energy (break down of substances)
anabolism - correct answer -building of substances
qualities of water - correct answer -1. act as a solvent bc of its polar nature,
negative attracts positive, vice versa
2. surface tensions-- provides physical strenght
3. high specific heat-- heat can be maintained in living entities, ex. maintaining
body temp
4. medium for most chemical reactions
mixture - correct answer -two substances combined but not chemically bound--
sugar and salt
solution - correct answer -two substances combined and not easily broken-- salt or
sugar in water
solute - correct answer -the substance that is dissolved-- the sugar
solvent - correct answer -solutions in which substances are dissolved
pH scales - correct answer -relates concentration to a numeric value
carbohydrates - correct answer -main source of energy for most living things
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