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Lecture 4

BIO205H5 Lecture Notes - Lecture 4: Skink, Swim Bladder, Visual Acuity

Course Code
Christoph Richter

of 1
BIO205 Lecture #4: 09/23/2014
Slide #5: Plants Use Different Photosynthetic Processes to Deal With Water Shortage and High
!Rice undergoes photosynthesis; C3 plant
!How can a plant regulate water : through the stoma along with gas exchange.
!C3 decrease in CO2 causes photosynthesis to be reversed.
Slide #7: How Can Whales Dive For That Long And Deep?
!How can whales dive for that long and deep?
o!Lung capacity (huge lungs = for longer depth of diving)
o!They can collapse their lungs
o!Comparative study of lung size and body size
!Graph shows the lung and body size to be as expected proportional relationship.
Slide #8: What Adaptions May Whales Have To Allow them Long And Deep Dives?
!Clicker Question: This graph shows that
o!All mamals can dive
o!Whales have lungs that are about as large as expected for their body size
o!Whales have lungs that are larger than expected for their body size
o!Whales do have lungs that are smaller than expected for their size
o!Sei and fin whales are also long divers.
Slide #9:
o!How are tuna adapted to their environment?
!Swim bladder regulate buoyancy
o!Tuna have red muscle at the center of their body
!Red muscle = warm muscle
o!The effected movement is due to the centralized location
Slide #10
o!Visual acuity is effected by water temperature
o!In colder water visual acuity is decreased which is not efficient for predators.
Slide #15
o!In cover rock areas allow for the optimal temperature for skink to be active