BISC 102 Lecture Notes - Lecture 1: Chemical Equilibrium

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azuremosquito828

17 Apr 2018

School

Simon Fraser University

Department

Biological Sciences

Course

BISC 102

Professor

Ron Ydenberg

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Document Summary

Both venus and mars atmosphere are made up of co2. Venus atmosphere is so hot that you can boil lead. Ca(cid:374)"t (cid:271)e orga(cid:374)i(cid:272) life for(cid:373) i(cid:374) ve(cid:374)us: mars is cold, but some of the canada are colder now that many places on the surfaces of mars. Could be creatures living there and may also have water. Lecture takes place in 2 different rooms, thursday at c9001 and. Lab and tutorial once a week and will start next week. Every one of the lectures is taped and posted on canvas under audio. Textbook required: biological science by freeman, harrington and. Pick lab manual today between 1;30 or 2;30 or tomorrow same time. Lab instructors are erin barley, tammy mcmullan and onkar bains. Other courses resources are : ron ydenberg: marks distribution. Lab assignments 5% iclickers 10% Lab exam is on week of april 2.

Related Questions

Exercise for writers (F):

Address each of the four following critical thinking areas to the statements listed below (B-F)

(I have already completed (A) so you can use it as a reference)

1. Find the conclusion- try to summarize it short enough so a person driving 65mph could read it on a billboard.

2. Establish the premise-

3. Distinguish between fact, opinion, & reasoned (using both fact & opinion) arguments by evaluating its validity

Validity/Truth of a statement can be made by:

Personal experience, reference of an established authority on subject, internal consistency, plus consistence on facts we already know as true.

4. Distinguish faulty reasoning- which is in every one of the statements!

Please answer #1-4 (listed above) for the each of the following quotes:

F. âBut people talk about cap and tax and they arenât sure exactly what weâre talking about. Letâs get back to step one. What is the problem? Why do we have to have this tax in the first place? Itâs about carbon dioxide. Well, what is carbon dioxide? Letâs just go to a fundamental question. Carbon dioxide, Mister Speaker, is a natural byproduct of nature. Carbon dioxide is natural. It occurs in Earth. It is a part of the regular lifecycle of Earth. In fact, life on planet Earth canât even exist without carbon dioxide. So necessary is it to human life, to animal life, to plant life, to the oceans, to the vegetation thatâs on the Earth, to the, to the fowl that â that flies in the air, we need to have carbon dioxide as part of the fundamental lifecycle of Earth. As a matter of fact, carbon dioxide is portrayed as harmful! But there isnât even one study that can be produced that shows carbon dioxide is a harmful gas. There isnât one such study because carbon dioxide is not a harmful gas, it is a harmless gas. Carbon dioxide is natural. It is not harmful. It is part of Earthâs life cycle. And yet weâre being told that we have to reduce this natural substance and reduce the American standard of living to create an arbitrary reduction in something that is naturally occurring in the earth. Well weâre told the crux of this problem is human activity. Itâs humans that are creating more carbon dioxide! Is that true, or is that false? Well, carbon dioxide is a natural part of Earthâs atmosphere. The carbon dioxide is perhaps three percent of the total atmosphere thatâs in the Earth. So if you take a pie chart, and you have all of Earthâs atmosphere, carbon dioxide is perhaps three percent of that total. What part of human activity creates carbon dioxide? If carbon dioxide is a negligible gas and itâs only three percent of Earthâs atmosphere, what part is human activity? Human activity contributes perhaps three

percent of the three percent. In other words, human activity is maybe 3 percent

contributing to the 3 percent of carbon dioxide thatâs in Earthâs atmosphere. Itâs so

negligible â itâs a fraction of a fraction of a fraction of a percent â that it can hardly

be â be quantified.â (Spoken on the House floor on Earth Day, April 22, 2009, by Rep. Michele Bachmann)

I need help on this microbiology question:

Contrary to our favorite science fiction books and movies, the chances of us finding another planet with a civilization comparable to, or even more advanced than our own, seems highly unlikely. But, through your work as a microbiologist at NASA, you have been able to help change our views as to what forms of life we should be looking for on planets in our solar system and around neighboring stars. Instead of radio signals or errant transmissions, we have begun looking for planets that have environments similar to those capable of sustaining life as we know it here on Earth. To determine what we could find out there, you have begun studying different unique and atypical environments found here on Earth. Although the harsh conditions of hot springs or undersea sulfur vents seem incompatible with most forms of life, organisms known collectively as "extremophiles" have still managed to survive and adapt to these extreme conditions. You believe extremophiles may help you gain insight into the potential metabolic requirements, processes, and challenges of extraterrestrial life. Thus far in your search, you have identified some prokaryotic cells that have evolved to survive in the extreme conditions of sulfur vents on the sea floor. These vents are found at great depths, where the crushing pressure and lack of light and oxygen are prohibitive to many forms of life. Bacteria that are not considered extremophiles reside in most ecological niches on this planet. There are some common criteria for the environment that would sustain these bacteria. Availability of water, pH that lies between 5 and 9, temperatures that will remain steady and below boiling; these are some of the characteristics that bacteria will require in their environment if they are to succeed. But in the environment of the ocean floor vents, not only is the pH of the water very low, but also the water temperature is unusually high due to the geologic activity that fuels the vents. Organisms that are adapted to such harsh conditions have necessarily evolved enzymes able to function beyond average optima, as well as a chemosynthetic metabolism capable of using vent organic and inorganic compounds as energy sources.

Part A - Comparable Earth Environments to Be Found on Another Planet

You identify the prokaryotic cells you've found as a species of bacteria. These bacteria appear to be living off of nutrients and sulfur compounds released from the vents on the sea floor. Over time, the bacteria must have evolved extreme metabolic and enzymatic capabilities to allow them to tolerate and even benefit from the extreme depths, the lack of oxygen, the low pH of the surrounding waters, high temperatures due to volcanic releases, and the unique nutrient source of the vents.

Choose the characteristics and their impact on enzyme activity that are not correct from the following statements. (more than one may be chosen)

Archaea are able to tolerate highly acidic pH environments and have proteins that will not denature in the low-pH environments that the bacteria are found in.

Archaea are able to colonize water that is at or above the boiling temperature due to high levels of disulfide bridges that maintain the three-dimensional structure of the enzyme.

Archaea are only able to survive exceedingly well at high temperatures due to the amount of activation energy required by their enzymes.

Archaea are able to grow in extremely shady or low-light conditions that allow for optimal enzyme activity.

champagneworm170

Some of you will have seen Starship Troopers, a moviebased upon a novel by Robert Heinlein. The film deviates from thebook in some ways, for example the book describes a visit to aplanet to resupply the dropships used in combat operations by theM.I. (mobile infantry). Heinlein describes this visit in the book;a portion of the novel is reproduced on the followingpage.

The followig passage contains two concepts we havediscussed in class in relation to the effects of mutation onpopulations, one positive and one negative. Describe the twomutation related concepts Heinlein discusses. You must describethese concepts as a biologist - you must use the technical terms wehave used in class properly and explain the positive and negativeeffect of mutation on the evolution and health of apopulation.

(a) What is the positive effect of mutation as describedby Heinlein?

(I.E., what does Heinlein describe as a benefit ofhaving more mutations)

(b) What is the negative effect of mutation as describedby Heinlein?

(I.E., what does Heinlein describe as a problem ofhaving more mutations)

I never have learned the co-ordinates of Sanctuary,nor the name or catalogue number of the star it orbits - becausewhat you donât know, you canât spill; the location isultra-top-secret, known only to shipâs captains, piloting officers,and such ... and I understand, with each of them under orders andhypnotic compulsion to suicide if necessary to avoid capture. So Idonât want to know. With the possibility that Luna Base might betaken and Terra herself occupied, the Federation kept as much ofits beef as possible as Sanctuary, so that a disaster back homewould not necessarily mean capitulation.

But I can tell you what sort of a planet itis. Like Earth, but retarded.

Literally retarded, like a kid who takes tenyears to learn to wave bye-bye and never does manage to masterpatty cake. It is a planet as near Earth as two planets can be,same age according to the planetologists and its star is the sameage as the Sun and the same type, so say the astrophysicists. Ithas plenty of flora and fauna, the same atmosphere as Earth, nearenough, and much the same weather; it even has a good-sized moonand Earthâs exceptional tides.

With all these advantages it barely got awayfrom the starting gate. You see, itâs short on mutations; it doesnot enjoy Earths high level of natural radiation.

Its typical and most highly developed plantlife is a very primitive giant fern; its top animal life is aproto-insect which hasnât even developed colonies. I am notspeaking of transplanted Terran flora and fauna - our stuff movesin and brushes the native stuff aside.

With its evolutionary progress held down toalmost to zero by lack of radiation and a consequent mostunhealthily low mutation rate, native life forms of Sanctuary justhavenât had a decent chance to evolve and arenât fit to compete.Their gene patterns remain fixed for a relatively long time; theyarenât adaptable - like being forced to play the same bridge handover and over again, for eons, with no hope of getting a betterone.

As long as they just competed with eachother, this didnât matter too much - morons among morons, so tospeak. But when types that had evolved on a planet enjoying highradiation and fierce competition were introduced, the native stuffwas outclassed.

Now all the above is perfectly obvious fromhigh school biology ... but the high forehead from the researchstation there who was telling me about this brought up a point Iwould have never thought of.

What about the human beings who havecolonized Sanctuary?

Not transients like me, but the colonists wholive there, many of whom were born there, and whose descendantswill live there, even unto the umpteenth generation - what aboutthose descendants? It doesnât do a person any harm not to beradiated; in fact itâs a bit safer - leukemia and some types ofcancer are almost unknown there. Besides that, the economicsituation is at present all in their favor; when they plant a fieldof (Terran) wheat;, they donât even have to clear out the weeds.Terran wheat displaces anything native.

But the descendants of those colonists wonâtevolve. Not much, anyhow. This chap told me that they could improvea little through mutation from other causes, from new blood addedby immigration, and from natural selection among the gene patternsthey already own - but that is all very minor compared with theevolutionary rate on Terra and on any usual planet. So whathappens? Do they stay frozen at their present levels while the restof the human race moves on past them, until they are livingfossils, as out of place as a pithecanthropus in a spaceship?

Or will they worry about the fate of theirdescendants and dose themselves regularly with X-rays or maybe setof lots of dirty-type nuclear explosions each year to build up afallout reservoir in their atmosphere? (Accepting, of course, theimmediate dangers of radiation to themselves in order to provide aproper genetic heritage of mutation for the benefit of theirdescendants.)

This bloke predicted that they would not doanything. He claims that the human is too individualistic, tooself-centered, to worry that much about future generations. He saysthat the genetic impoverishment of distant generations through thelack of radiation is something most people are simply incapable ofworrying about. And of course it is a far-distant threat; evolutionworks so slowly, even on Terra, that the development of a newspecies is a matter of many, many thousands of years.

I donât know. Shucks, I donât know what Imyself will do more than half the time; how can I predict what acolony of strangers will do? But Iâm sure of this: Sanctuary isgoing to be fully settled, either by us or by the bugs. Or bysomebody. It is a potential utopia, and, with desirable real estateso scarce in this end of the Galaxy, it will not be left in thepossession of primitive life forms that failed to make thegrade.

BISC 102 Lecture Notes - Lecture 1: Chemical Equilibrium

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