BIO 1500 FINAL MIZZOU UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS COMPLETE STUDY GUIDE

BIO 1500 FINAL MIZZOU UPDATED
ACTUAL QUESTIONS AND CORRECT
ANSWERS COMPLETE STUDY GUIDE

●● 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
-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