Bio 1500 Final Exam Mizzou Questions With correct answers
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Course
Bio 1500
Institution
Bio 1500
Bio 1500 Final Exam Mizzou Questions With correct answers/Bio 1500 Final Exam Mizzou Questions With correct answers/Bio 1500 Final Exam Mizzou Questions With correct answers
Bio 1500 Final Exam Mizzou Questions With correct
answers
dragon fly size - correct answer -high O2 levels in carboniferous allowed them to grow big
-later in history predators constrained the max size
O2 levels in atomosphere - correct answer cyanobacteria and green algae chloroplasts
contributed.... through photosynthesis
oldest fossils - correct answer 3.5-4 bya
1st insects - correct answer 480 mya
1st dinosaurs - correct answer 240 mya
dinosaurs go extinct - correct answer 66 mya
1st homosapiens - correct answer 200k ya
diffusion - correct answer mvmt of molecules from high to low concentration
-driven by Brownian (thermal) mvmts
each molecule during diffusion - correct answer -moves randomly
-behavior unpredictable
-each individual molecule never stops moving
net movement of molecules in diffusion - correct answer -from high to low conc.
-predictable
-stops when it reaches equlibrium
Photosynthesis - correct answer -light energy is used to make carbs from CO2 and water
-takes place in chloroplasts
chloroplasts - correct answer -contain the pigment chlorophyll
-chlorophyll absorbs red, blue, & violet light
step 1 of photosynthesis - correct answer -light reactions
-ATP is synthesized, NADPH is generated
-water is split apart, releasing O2 as a by product
ATP - correct answer -used to transport E around cells
-chemical E stored in the bonds
-important bonds between 2nd and 3rd phosphate group
, Bio 1500 Final Exam Mizzou Questions With correct
answers
-going to lower energy state breaks bonds and releases the energy
step 2 of photosynthesis - correct answer -light independent reactions
-E from ATP & NADPH are used to build glucose from CO2 & water (Carbon Cycle)
Great Oxygenation Event - correct answer -3 -2.3 bya
-cyanobacteria evolved photosynthesis
-free O2 as a side effect... led to some O2 levels in atmosphere
O2 accumulation in atmosphere - correct answer -minerals formed (ex: banded iron ore)
-ozone layer formed (protection from UV light)
-free O2 toxic to cells
-O2 reacted with methane.... led to snowball ice age
-prokaryotes evolved ways to use O2... evolution of cellular respiration
Evolution - correct answer -a change in allele frequencies in a population
-natural selection is one of the mechanisms
gene - correct answer -a segment of DNA w/ instructions for building a protein molecule
-specifies the sequence of amino acids that makeup the protein
alleles - correct answer -different possible forms of the same gene
-differ in DNA sequence & in protein structure they code for
-may be many alleles for same gene
-any 1 person can have max of 2 different alleles
Natural Selection - correct answer -phenotypes are variable in population
-offspring have similar phenotype as parents
-mutations occur randomly, but doesn't create new alleles
-natural selection not goal directed
Postulates of natural selection - correct answer 1. individuals vary in their traits
2. some of the variation is heritable (can be passed to offspring)
3. more offspring are produced than survive to reproduce
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