Announcements • GATTACA & Radish work due now. • Reminders: PHS notes provided (green pages) & Learning Objectives provided in Course Packet • Honors Option: solo research 10 minute talk @Briggs Symposium
Jan 04, 2016
Announcements
• GATTACA & Radish work due now.
• Reminders: PHS notes provided (green pages) & Learning Objectives provided in Course Packet
• Honors Option: solo research 10 minute talk @Briggs Symposium
1. Which of the following statements is a correct distinction between autotrophs and heterotrophs?
A. Only heterotrophs require chemical compounds from the environment
B. Cellular respiration is unique to heterotrophsC. Only heterotrophs have mitochondriaD. Autotrophs, but not heterotrophs, can nourish
themselves beginning with CO2E. Only heterotrophs require oxygen
Are you reading, notes, studying? Test your participation
1. The light reactions of photosynthesis supply the Calvin cycle with?
A. light energyB. CO2 and ATPC. H2O and NADPHD. ATP and NADPHE. sugar and O2
Short Experiment:
Growing radishes from seed
Biology Radish ProblemWeighed out 3 batches of radish seeds (each 1.5
g).Experimental treatments:
» 1. Seeds not moistened (dry) placed in LIGHT » 2. Seeds on moistened paper towels in LIGHT» 3. Seeds on moistened paper towels in DARK
After 1 week, all plant material was dried & weighed.
• TASK: Predict the (dried) biomass of the plant material in the various treatments.
Predict the final (dried) bio-mass [increase/decrease/no change]
A. no change – increase – no changeB. increase – increase – increaseC. increase – decrease – no changeD. decrease – increase – decreaseE. None of the above are correct
Results: Weight of Radish Seedlings
1.46 g 1.63 g 1.20 g
How do you explain the results?(Remember all treatments started as 1.5g).
When Light Is Absorbed, Electrons Enter an Excited State
Time to capture photons (photosystem football)
How is Oxygen generated in Photosynthesis?
How is Oxygen generated in Photosynthesis?A.CO2 is split into carbon and oxygenB.H2O is split into hydrogen and oxygenC.Light beams oxidize water making O2D.None of the above
ATP powers everything
Peter Mitchell: Diffusion is the answer!
Paul Boyer: I think it actually twists!
Masasuke Yoshida “Ummm… check this out.”
Masasuke Yoshida “Ummm… check this out.”
Masasuke Yoshida “Ummm… check this out.”