Class notes
Lecture 1 & 2
- Course
- Institution
Lecture notes of 3 pages for the course Biology 101 at WLU (Class notes)
[Show more]
Seller
Follow
rpatel
Content preview
September 12th, 2012Chapter 1: Light & Life
Green Algae
• Chlamyodomonas Reinhardtii – common algae
• Uses light for both energy and info
• Eyespot: Light sensor
• Responds by moving closer and farther away
• Toward (not intense) forward (intense) to use light as source of energy
• Chloroplast uses it as a source of energy
The Sun
• Reason for life on earth
• Optimal distance from sun to use as energy
• Energy comes from conversion of matter
• Producing electromagnetic radiation
• Many kinds of electromagnetic radiation
• Short and long wavelength have different levels of electromagnetic energy
• Shorter = high energy, Longer = low energy
• Visible wavelength (400-700nm) visible to us
What is Light?
• Photons: discrete packet of energy
• Waves of photon = light
• Light: electromagnetic radiation that humans can detect with eyes
• Wavelength: distance between two successive peaks
• Pigment: molecules that absorbs light so that it can be used
• Associates with matter (light + pigment interaction)
Bacteriorhodospin
• Membrane protein bound to a molecule
• Allows halobacteria to use light as energy
• Proton (H+) pump
The Eye
• What distinguishes eye of an anima from eyespot of green algae C.
Reinhardtii
• Human eyes are image forming
Vision
• Requires brain to interpret images
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller rpatel. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62555 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now