Date post: | 03-Jan-2016 |
Category: |
Documents |
Upload: | blake-jennings |
View: | 25 times |
Download: | 0 times |
Bonus #2 due now(Bonus #3 is posted)
Today:plant biotech and an intro to animals
Human resource production and use
http://www.earth-policy.org/Indicators/Grain/2006.htm
Worldwide Grain Production and Consumption
We can now directly insert new genes into or modify existing genes of plants
CB 20.2
Why Change a Plant’s DNA?
• Can change plant so that it has new or different characteristics– Produce needed protein
– Insect resistance (Bt toxin)
– Herbicide resistance (Round-up)
– Drought or other stress resistance
– Chemical remediation
Mil
lion
s of
Hec
tare
s
Texas =70 ha
Is genetically engineering plants a good idea?
http://www.gmo-compass.org/eng/agri_biotechnology/gmo_planting/257.global_gm_planting_2006.html
Worldwide area planted with genetically modified crops
Is changing a plant’s DNA a good or bad idea?
• Genes flow within species and between species.
• Are GM foods safe for the environment?
• Are GM foods profitable for:– Consumers, Farmers, and Companies?
Pollution in Gulf of Mexico from run-off in the Mississippi river
http://blog.nola.com/times-picayune/2007/06/despite_promises_to_fix_it_the.html
(Staff graphic by Dan Swenson)
‘07
Pollen is easily transferred from plant to plant, and to related species.
GM crops illegal
GM crops found in Oaxaca and other MX states
Genetic information moves.
GM crops illegal
GM crops found in Oaxaca and other MX states
Genetic information moves, and is self-replicating.
Is changing a plant’s DNA a good or bad idea?
• Genes flow within species and between species.
• Are GM foods safe for the environment?
• Are GM foods profitable for:– Consumers, Farmers, and Companies?
Herbicide Tolerance; Insect Resistance; Viral Resistance
Types of Genetically Modified Crops
0
10
20
30
40
50
60
70
80
90
100
110
120
130
12/2/00 4/16/02 8/29/03 1/10/05 5/25/06 10/7/07
date
adjusted closing stock price $
Monsanto stock price: 3/24/08 at 12:30pm= $106
Grain farmer claims moral victory in seed battle
Ten years after he took on the multinational Monsanto, Saskatchewan man gets $660 and the right to talk about ithttp://www.theglobeandmail.com/servlet/story/LAC.20080320.FARMER20/TPStory/National
The Schmeisers' saga began more than 10 years ago, when Monsanto sued them after plants grown from genetically modified canola seeds were found on the couple's farm near Bruno, Sask., about 90 kilometres east of Saskatoon.
The company said the Schmeisers violated its patent on the seeds, which had been genetically modified to resist Monsanto-brand herbicide, and that the couple knowingly planted them without paying the technology fees. Monsanto's claim sought damages totalling $400,000.
http://www.theglobeandmail.com/servlet/story/LAC.20080320.FARMER20/TPStory/National
But the Schmeisers denied using the Monsanto seeds, arguing that the seeds blew onto their property from a nearby road or neighbouring farms.
In 2004, the Supreme Court ruled 5-4 in favour of Monsanto, stating that plant genes and modified cells can be patented. Although the Schmeisers lost the case, the court ruled they did not have to pay damages.http://www.theglobeandmail.com/servlet/story/LAC.20080320.FARMER20/TPStory/National
Grain farmer claims moral victory in seed battleTen years after he took on the multinational Monsanto, Saskatchewan man gets $660 and the right to talk about it
The following year, more of the genetically modified canola appeared on the Schmeisers' farm. They pulled it out themselves and sent Monsanto a bill for $660.http://www.theglobeandmail.com/servlet/story/LAC.20080320.FARMER20/TPStory/National
Many Questions, but Few Answers?
• Genes flow within species and between species.
• Are GM foods safe for the environment?
• Are GM foods profitable for:– Consumers, Farmers, and Companies?
CB 26.22
Life as we know it…the animals
One important consideration of structure and function…surface area
Nalca leaveshttp://www.celebratebig.com/chile/index3.htm
CB 40.3
One important consideration of structure and function…surface area
CB 40.4Why is surface area so critical?
Animals (and plants) must exchange various components with the environment
Organisms are organized:
atoms
molecules
organelles
cells
tissues
organs
systems
organisms
Four major tissue types in animals:
epithelial, connective, muscle, and nervous
CB 40.5
Epithelieal tissue:Covers and lines body and/or parts. Tightly packed cells.
CB 40.5
Connective tissue:Holds and supports. Few cells with an extensive extracellular matrix.
CB 40.5Muscle tissue:Movement. Long muscle fibers cells.
Nerve tissue:Signaling. Generally long cells, neurons.
CB 40.6
Different tissues that comprise the stomach, an organ.
CB 40.11
Homeostasis:
Maintaining a steady-state
internalcondition
Bonus #2 due now(Bonus #3 is posted)
Today:plant biotech and an intro to animals