Exam 1
Biology 1108 with Clark at College of Coastal Georgia
About this deck
By: Rebecca Buchanan
Textbook:
Biology Laboratory Manual
Biology, 9th Edition
Created: 2012-04-28
Size: 24 flashcards
Views: 60
Textbook:
Biology Laboratory Manual Biology, 9th EditionCreated: 2012-04-28
Size: 24 flashcards
Views: 60
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on one side of a river you have a pop. of red p, on the other you have a pop. of yellow p. yellow p are migrating to the red pop. and hybridizing with them. this is an example of....
gene flow
genotypes are said to be in __________ equilibrium if there is no random mating and no other forces tend to alter the proportions of alleles from one gen. to the next
hardy-weinberg
bottleneck effect
Genetic drift resulting from the reduction of a population, typically by a natural disaster, such that the surviving population is no longer genetically representative of the original population.
what is the best representation of how "fit" an organism is in relation to natural selection?
how many offspring it produces
in small pops, frequencies of certain alleles may change by chance alone. such random change is called
genetic drift
in negative frequency-dependent selection, such as in the study done on the water boatman insect, the insidence of predation leads to an
increase in a rare genotype
disruptive selection
two or more extreme phenotypes are fitter than the intermediate phenotype.
Directional Selection
One extreme is favored
about 80% of the alleles present in thoroughbred horses can be dated back to 31 known ancestors. expect:
little variation in physiology and behavior
overall similarity of phenotypes may not always reflect evolutionary relationships due to...
convergent evolution, variation in rates of evolutionary change, homoplasy
the study and reconstruction of evolutionary relationships is
systematics
parsimony
favors the hypothesis that requires the fewest assumptions
-bird is more related to crocodile example
birds, snakes, lizards, turtles, and crocs are all thought to share a common ancestor and several homologous traits. these animals rep:
a monophyletic group
parental care in dinosaurs, crocs, and birds is an example of
homology caused by common descent
the phylogenetic species concept declares that a group is a species if it
has evolved one or more of its own derived characters
T/F: The independent evolution of herbivory in beetle clades is closely linked to their great species richness
false
prokaryotic DNA is located in the
nucleoid region
prokaryotes are very important because of involvement in all except
STD's
what characteristic makes prokaryotes and eukaryotes similar
contain ribosomes
a bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a bi-product. classify
photoautotroph
prokaryotes that harvest both energy and carbon atoms from organic molecules are called
chemoheterotrophs
some prokaryotes attach to other substrates by hairlike outgrowths, which are shorter than flagella. these are called:
pili
gram-positive and gram-negative bacteria are characterized by differences in:
the cell wall: gram + have a thick layer of peptidoglycan and gram - have an outer membrane
in prokaryotic organisms enzymes that assist in celluar respiration are attached to the
cell membrane
About this deck
By: Rebecca Buchanan
Textbook: Biology Laboratory Manual
Biology, 9th Edition
Created: 2012-04-28
Size: 24 flashcards
Views: 60
Textbook:
Biology Laboratory Manual Biology, 9th EditionCreated: 2012-04-28
Size: 24 flashcards
Views: 60
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy