New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

ENV class notes (9/2, 9/7, 9/9)

by: Hannah Fretheim

ENV class notes (9/2, 9/7, 9/9) Env 1301

Marketplace > Baylor University > Env 1301 > ENV class notes 9 2 9 7 9 9
Hannah Fretheim
Baylor University
GPA 3.8

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Ecology and Economics, DNA and the beginning of Evolution
Exploring Environmental Issues
Trey Brown
Class Notes
25 ?




Popular in Exploring Environmental Issues

Popular in Department

This 2 page Class Notes was uploaded by Hannah Fretheim on Sunday September 11, 2016. The Class Notes belongs to Env 1301 at Baylor University taught by Trey Brown in Fall 2016. Since its upload, it has received 6 views.


Reviews for ENV class notes (9/2, 9/7, 9/9)


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/11/16
ENV class notes (9/2- 9/9) Interaction of Ecology and Economics Chesapeake Bay Story: - On the land near the Chesapeake Bay, farmers used fertilizer made up of Nitrogen and Phosphorus. Rain then washed these chemicals into the Chesapeake. The Nitrogen and Phosphorus caused phytoplankton in the bay to grow beyond what they normally would. Eventually, the phytoplankton ran out of nutrients, died and sank to the bottom where bacteria fed off of them. The bacteria also absorbed oxygen during this process which caused the overall level of oxygen to decrease. Less oxygen caused other organisms living in the bay to die, including crabs, fish and oysters. - Pollution causes there to be fewer crabs and oysters which means there is less for fishermen to catch. The loss of oysters also effects the water. Because oysters are filter feeders, the water becomes less clean when they are removed. There is space known as “the commons” which is public space that can be used by anyone. This space is often abused, leading to what is referred to as the “tragedy of the commons.” - Randy Newman wrote the song “Burn On” about the Cuyahoga River which became so polluted that it actually caught on fire. This river was a part of the “commons.” - What needs to be regulated? How do we decide? Ecosystems can benefit us by providing things we need and use such as water, fiber and fuel. Parts of ecosystems, particularly trees, can also serve as filter systems. In order for ecosystems to last, they must retain their biodiversity. Threats to ecosystems: - Deforestation- Cutting down trees has the potential both to cause flooding and to make the land dry and unusable (desertification). The loss of trees also leads to an increase of carbon dioxide in the atmosphere. - Overharvesting - Non-native species- When species that are not natural to an ecosystem are introduced, they can threaten the survival of native species. - Habitat destruction- This is the biggest way that we threaten ecosystems. - Pollution TED talk - Problem: “Our economy is bigger than our planet.” - We rely on economic growth. The problem is that our economy cannot grow an unlimited amount. If we keep doing what we are doing, it is likely that we will run out of resources which will lead to all kinds of other problems. We need to understand how important this is and be willing to actually change the way we do things. DNA (deoxyribonucleic acid): Molecules which are blueprints for all the traits that we possess - There are 46 DNA molecules in the nucleus of every one of our cells. All together the DNA in one cell can stretch to about 3 feet. - DNA code tells ribosomes which protein to build - DNA => RNA (partial copies of a part of DNA) => protein (built in ribosomes, must be the correct shape to work) => growth - Made up of 4 nucleotides (A, T, C and G). A and T pair together and C and G pair together. Genes - A piece of DNA which codes for a trait. - Organisms share similarities in their genetic makeups. Half of the genes between us and fruit flies are the same. Evolution - According the video viewed in class, evolution is “Any change in heritable traits within a population across generations.” - Evidence suggests that all life on earth shares a common ancestor. - All creatures copy their DNA through reproduction, but not perfectly. o Some creatures make exact copies of themselves. However, slight differences in the DNA code often occur (mutations) which can then be passed down further. o Other creatures combine their DNA with a partner to reproduce. The offspring’s DNA is then made up of traits passed down from the mother and the father as well as mutations. - Wallace and Darwin both discovered natural selection, which explains how evolution can occur on its own in nature.


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Jennifer McGill UCSF Med School

"Selling my MCAT study guides and notes has been a great source of side revenue while I'm in school. Some months I'm making over $500! Plus, it makes me happy knowing that I'm helping future med students with their MCAT."

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.