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Bio 1500 Final Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
Dragon fly size - Answer✔-high O2 levels in carboniferous allowed them to grow big
-later in history predators constrained the max size
O2 levels in atomosphere - Answer✔cyanobacteria and green algae chloroplasts contributed....
through photosynthesis
oldest fossils - Answer✔3.5-4 bya
1st insects - Answer✔480 mya
1st dinosaurs - Answer✔240 mya
dinosaurs go extinct - Answer✔66 mya
1st homosapiens - Answer✔200k ya
diffusion - Answer✔mvmt of molecules from high to low concentration
-driven by Brownian (thermal) mvmts
each molecule during diffusion - Answer✔-moves randomly
-behavior unpredictable
-each individual molecule never stops moving
net movement of molecules in diffusion - Answer✔-from high to low conc.
-predictable
-stops when it reaches equlibrium
Photosynthesis - Answer✔-light energy is used to make carbs from CO2 and water
-takes place in chloroplasts
chloroplasts - Answer✔-contain the pigment chlorophyll
1|Page
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-chlorophyll absorbs red, blue, & violet light
step 1 of photosynthesis - Answer✔-light reactions
-ATP is synthesized, NADPH is generated
-water is split apart, releasing O2 as a by product
ATP - Answer✔-used to transport E around cells
-chemical E stored in the bonds
-important bonds between 2nd and 3rd phosphate group
-going to lower energy state breaks bonds and releases the energy
step 2 of photosynthesis - Answer✔-light independent reactions
-E from ATP & NADPH are used to build glucose from CO2 & water (Carbon Cycle)
Great Oxygenation Event - 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 - 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 - Answer✔-a change in allele frequencies in a population
-natural selection is one of the mechanisms
gene - Answer✔-a segment of DNA w/ instructions for building a protein molecule
-specifies the sequence of amino acids that makeup the protein
alleles - 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 - Answer✔-phenotypes are variable in population
-offspring have similar phenotype as parents
2|Page
Bio 1500 Final Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
Dragon fly size - Answer✔-high O2 levels in carboniferous allowed them to grow big
-later in history predators constrained the max size
O2 levels in atomosphere - Answer✔cyanobacteria and green algae chloroplasts contributed....
through photosynthesis
oldest fossils - Answer✔3.5-4 bya
1st insects - Answer✔480 mya
1st dinosaurs - Answer✔240 mya
dinosaurs go extinct - Answer✔66 mya
1st homosapiens - Answer✔200k ya
diffusion - Answer✔mvmt of molecules from high to low concentration
-driven by Brownian (thermal) mvmts
each molecule during diffusion - Answer✔-moves randomly
-behavior unpredictable
-each individual molecule never stops moving
net movement of molecules in diffusion - Answer✔-from high to low conc.
-predictable
-stops when it reaches equlibrium
Photosynthesis - Answer✔-light energy is used to make carbs from CO2 and water
-takes place in chloroplasts
chloroplasts - Answer✔-contain the pigment chlorophyll
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
-chlorophyll absorbs red, blue, & violet light
step 1 of photosynthesis - Answer✔-light reactions
-ATP is synthesized, NADPH is generated
-water is split apart, releasing O2 as a by product
ATP - Answer✔-used to transport E around cells
-chemical E stored in the bonds
-important bonds between 2nd and 3rd phosphate group
-going to lower energy state breaks bonds and releases the energy
step 2 of photosynthesis - Answer✔-light independent reactions
-E from ATP & NADPH are used to build glucose from CO2 & water (Carbon Cycle)
Great Oxygenation Event - 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 - 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 - Answer✔-a change in allele frequencies in a population
-natural selection is one of the mechanisms
gene - Answer✔-a segment of DNA w/ instructions for building a protein molecule
-specifies the sequence of amino acids that makeup the protein
alleles - 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 - Answer✔-phenotypes are variable in population
-offspring have similar phenotype as parents
2|Page
