chapter 3

chapter 3 - Chapter 3 Adaptations to Physical Environment...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 3 Adaptations to Physical Environment Light o Wavelengths Primary source of energy for biosphere Visible wavelengths of light= light used for photosynthesis, 400 nm to 700 nm, also called the photosynthetically active region PAR Sunlight packaged in small units of energy called photons Only a small portion of solar radiation reaching the earth is converted into biological production through photosynthesis Irradiance- the intensity of the light of all wavelengths impinging on a surface…reflects green and yellow which is why plants are green Carotenoids pass on the light energy they capture to chlorophyll to begin the sequence of reactions in photosynthesis Water absorbs light/color very weakly but enough to limit the depth of the photic zone aka where light can be seen o Photosynthesis 6 CO2 + 6 H2O + photons C6H12O6 +6 O2 step 1: capture light energy by photosynthetic pigments step 2: chlorophyll molecules in a chloroplast absorb photons and then release electrons that are passed along a chain of reactions to produce the high energy compounds ATP and NADPH (first 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/12/2012 for the course PB 360 taught by Professor Wentworth during the Fall '08 term at N.C. State.

Page1 / 3

chapter 3 - Chapter 3 Adaptations to Physical Environment...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online