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Exam- BIOL 1108 Exam 2 Study Guide Questions/Answers

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  • Course
  • BIOL 1108
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  • BIOL 1108

Exam- BIOL 1108 Exam 2 Study Guide Questions/Answers

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  • September 11, 2024
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  • Exam (elaborations)
  • Questions & answers
  • BIOL 1108
  • BIOL 1108
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Exam- BIOL 1108 Exam 2 Study Guide
Questions/Answers

How do the plants in the Sonoran Desert grow and survive the climate? CORRECT ANS-

Desert plants often have different adaptations to help them survive such as using C4 or CAM

photosynthesis rather than C3. Some desert plants have needle-like leaves, waxy cuticles,

large root systems, or succulence (water stored in leaves).




What is LUCA and when did it exist? CORRECT ANS-LUCA is the last universal common

ancestor. It existed about 3.5 billion years ago.




What is the difference between eukaryotes and prokaryotes? CORRECT ANS-Eukaryotes

have membrane-bound organelles.




When did cyanobacteria evolve? CORRECT ANS-3.5 billion years ago




What kind of metabolism do cyanobacteria have? CORRECT ANS-photosynthetic




How are cyanobacteria a part of the Carbon Cycle? CORRECT ANS-Chloroplasts are derived

from cyanobacteria.

, Exam- BIOL 1108 Exam 2 Study Guide
Questions/Answers


Who is Lynn Margulis, and what idea did she suggest? CORRECT ANS-She suggested the

Endosymbiosis Hypothesis, which claims that mitochondria and chloroplasts were once free-

living prokaryotic organisms that were engulfed but not digested by larger host cells.




What evidence is there for Lynn Margulis' theory? CORRECT ANS-Two organelles

(mitochondria and chloroplasts) have their own DNA.




What are the two membrane bound organelles in the Endosymbiosis Hypothesis, and which

one evolved first? CORRECT ANS-Mitochondria and chloroplasts; mitochondria evolved

first.




Where does plant biomass come from? CORRECT ANS-Most of a plant's biomass is

cellulose, a sugar, and it comes from the air.




What is the chemical equation for photosynthesis? CORRECT ANS-6CO2 + 6H2O ->

C6H12O6 + 6O2

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