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2024 BIOLOGY 1108 FARMER/TRAPNELL UGA EXAM 1 WITH CORRECT ANSWERS
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2024 BIOLOGY 1108 FARMER/TRAPNELL UGA EXAM 1 WITH CORRECT ANSWERS
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2024 BIOLOGY 1108FARMER/TRAPNELL UGA EXAM
1 WITH CORRECT ANSWERS
What are microsatellites? - CORRECT ANSWERS-tandem repeats or simple
sequence repeats
What are allozymes? - CORRECT ANSWERS-variations of proteisn
What are RFLPs - CORRECT ANSWERS-variants in DNA exposed by cutting
with restriction enzymes
What is codominance - CORRECT ANSWERS-alleles are equally strong and
neither are masked by the other. "blending of the phenotypes"
When was the first definite evidence of life? - CORRECT ANSWERS-3.5 billion
years ago
Oldest known rocks? - CORRECT ANSWERS-4 billion years ago ( also
contained carbon deposits that may indicate the existence of life.
What are the three domains that living things are classified under? -
CORRECT ANSWERS-Archaea, Eubacteria,(prokaryotes) and Eukarya
(Eukaryotes)
How old are multicellular eukaryotes? - CORRECT ANSWERS-less than a
billion years old
What is the neutral region of the genome - CORRECT ANSWERS-sequence of
the genome not expressed, a sequence region that produces no phenotype
Describe AFLPs - CORRECT ANSWERS-after digest with restriction enzymes, a
subset of DNA fragments are selected for PCR amplification
Which group of organisms had the greatest impact on the Earth's oceans and
atmosphere? - CORRECT ANSWERS-Cyanobacteria
, What two elements was the primordial atmosphere comprised of? - CORRECT
ANSWERS-H and He
What was the primordial atmosphere stripped away by? What was the new
atmosphere developed primarily by? - CORRECT ANSWERS-solar winds; new
atmosphere was developed by outgassing. Also, comets and meteorites
bring gases with them that contribute to the Earth's atmosphere.
Where did the water go from the primordial atmosphere? - CORRECT
ANSWERS-H2O condensed to form the oceans and Co2 dissolved into the
oceans and precipitated out as carbonates.
What are stromatolites formed by? - CORRECT ANSWERS-colonies of
cyanobacteria that form biosedimentary domes of calcium carbonate
When was oxygen introduced into the atmosphere? What was it introduced
by? - CORRECT ANSWERS-2.2 billion years ago. Introduced by photosynthetic
cyanobacteria
How can we detect the introduction of oxygen in the Earth's atmosphere
geologically? - CORRECT ANSWERS-through layers of iron oxide on the
bottoms of oceans which started forming when oxygen appeared
What event marked the end of the Archaean Era and the onset of the
proterozoic Era? - CORRECT ANSWERS-The introduction of oxygen into the
atmosphere
How and when did eukaryotes come into existence - CORRECT ANSWERS-
Eukaryotes were formed by the union of 2 prokaryotes 2 billion years ago
How are Eukaryotes distinguished? - CORRECT ANSWERS-By their
cytoskeleton and a nucleus
Explain Endosymbiont Hypothesis - CORRECT ANSWERS-It explains how
chloroplasts arose. A fully formed eukaryote ingested a cyanobacterium
What was the climate like in the early paleozoic-ordovician Perion - CORRECT
ANSWERS-The cimlate was warm. Sea levels were highest ever documented
What did the continents look like in the Ordovician? - CORRECT ANSWERS-
The southern continents were collected into a single southern continent
called Gondwana
What happened to the marine fauna in ordovician? - CORRECT ANSWERS-
fourfold increase in genera of marine fauna
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