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Bio 123

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Darwin
naturalist, explored south America and Africa for 5 yrs
Lyell
slow genetic change
Curier
palaeontology, study of fossils
Malthus
population increases faster than food supply
Lamarack
thought the individual organism could change
Wallace
also formulated natural selection theory
evidence of natural selection 1
anatomical and embryological evidence
evidence of natural selection 2
biogeography
evidence of natural selection 3
fossil record
evidence of natural selection 4
molecular evidence
ionic bonds
type of chemical bond formed through an electrostatic attraction between two oppositely charged ions
covalent bonds
forces that hold an atom together
hydrogen bonds
is the attractive interaction of a hydrogen atom with an electronegative atom, such as nitrogen, oxygen or fluorine, that comes from another molecule or chemical group
isotope
atoms of an element that have a different number of nuetrons
uses of isotopes
radioactive isotopes for medicine (iodine for example)
importance of carbon
allows to have a complex structure
lipids
provide energy storage
carbohydrates
energy sources and structural components
proteins
important for structure, 50% of dry weight of cells
nucleic acid
biological molecules essential for life, and include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid)
example of lipids
fat
example of carbohydrates
polysaccharide
examples of proteins
polypeptide
example of nucleic acids
dna, rna
subunits of lipds
monosaccaride
subunits of lipids
glycerol, fatty acids
subunits of proteins
amino acids
subunits of nucleic acids
nucleotide
starch
storage of carbohydrates
glycogen
primary short term energy storage in human
cellulose
structural part of plants
chitin
structure in animals and fungi